[289] | 1 | <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
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| 2 | /** |
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| 3 | * CodeIgniter |
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| 4 | * |
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| 5 | * An open source application development framework for PHP 5.1.6 or newer |
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| 6 | * |
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| 7 | * @package CodeIgniter |
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| 8 | * @author ExpressionEngine Dev Team |
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| 9 | * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. |
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| 10 | * @license http://codeigniter.com/user_guide/license.html |
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| 11 | * @link http://codeigniter.com |
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| 12 | * @since Version 1.0 |
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| 13 | * @filesource |
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| 14 | */ |
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| 15 | |
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| 16 | // ------------------------------------------------------------------------ |
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| 17 | |
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| 18 | /** |
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| 19 | * MySQLi Database Adapter Class - MySQLi only works with PHP 5 |
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| 20 | * |
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| 21 | * Note: _DB is an extender class that the app controller |
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| 22 | * creates dynamically based on whether the active record |
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| 23 | * class is being used or not. |
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| 24 | * |
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| 25 | * @package CodeIgniter |
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| 26 | * @subpackage Drivers |
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| 27 | * @category Database |
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| 28 | * @author ExpressionEngine Dev Team |
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| 29 | * @link http://codeigniter.com/user_guide/database/ |
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| 30 | */ |
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| 31 | class CI_DB_mysqli_driver extends CI_DB { |
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| 32 | |
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| 33 | var $dbdriver = 'mysqli'; |
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| 34 | |
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| 35 | // The character used for escaping |
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| 36 | var $_escape_char = '`'; |
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| 37 | |
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| 38 | // clause and character used for LIKE escape sequences - not used in MySQL |
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| 39 | var $_like_escape_str = ''; |
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| 40 | var $_like_escape_chr = ''; |
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| 41 | |
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| 42 | /** |
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| 43 | * The syntax to count rows is slightly different across different |
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| 44 | * database engines, so this string appears in each driver and is |
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| 45 | * used for the count_all() and count_all_results() functions. |
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| 46 | */ |
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| 47 | var $_count_string = "SELECT COUNT(*) AS "; |
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| 48 | var $_random_keyword = ' RAND()'; // database specific random keyword |
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| 49 | |
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| 50 | /** |
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| 51 | * Whether to use the MySQL "delete hack" which allows the number |
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| 52 | * of affected rows to be shown. Uses a preg_replace when enabled, |
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| 53 | * adding a bit more processing to all queries. |
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| 54 | */ |
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| 55 | var $delete_hack = TRUE; |
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| 56 | |
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| 57 | // whether SET NAMES must be used to set the character set |
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| 58 | var $use_set_names; |
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| 59 | |
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| 60 | // -------------------------------------------------------------------- |
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| 61 | |
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| 62 | /** |
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| 63 | * Non-persistent database connection |
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| 64 | * |
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| 65 | * @access private called by the base class |
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| 66 | * @return resource |
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| 67 | */ |
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| 68 | function db_connect() |
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| 69 | { |
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| 70 | if ($this->port != '') |
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| 71 | { |
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| 72 | return @mysqli_connect($this->hostname, $this->username, $this->password, $this->database, $this->port); |
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| 73 | } |
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| 74 | else |
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| 75 | { |
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| 76 | return @mysqli_connect($this->hostname, $this->username, $this->password, $this->database); |
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| 77 | } |
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| 78 | |
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| 79 | } |
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| 80 | |
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| 81 | // -------------------------------------------------------------------- |
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| 82 | |
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| 83 | /** |
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| 84 | * Persistent database connection |
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| 85 | * |
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| 86 | * @access private called by the base class |
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| 87 | * @return resource |
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| 88 | */ |
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| 89 | function db_pconnect() |
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| 90 | { |
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| 91 | return $this->db_connect(); |
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| 92 | } |
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| 93 | |
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| 94 | // -------------------------------------------------------------------- |
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| 95 | |
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| 96 | /** |
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| 97 | * Reconnect |
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| 98 | * |
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| 99 | * Keep / reestablish the db connection if no queries have been |
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| 100 | * sent for a length of time exceeding the server's idle timeout |
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| 101 | * |
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| 102 | * @access public |
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| 103 | * @return void |
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| 104 | */ |
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| 105 | function reconnect() |
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| 106 | { |
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| 107 | if (mysqli_ping($this->conn_id) === FALSE) |
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| 108 | { |
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| 109 | $this->conn_id = FALSE; |
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| 110 | } |
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| 111 | } |
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| 112 | |
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| 113 | // -------------------------------------------------------------------- |
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| 114 | |
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| 115 | /** |
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| 116 | * Select the database |
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| 117 | * |
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| 118 | * @access private called by the base class |
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| 119 | * @return resource |
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| 120 | */ |
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| 121 | function db_select() |
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| 122 | { |
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| 123 | return @mysqli_select_db($this->conn_id, $this->database); |
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| 124 | } |
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| 125 | |
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| 126 | // -------------------------------------------------------------------- |
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| 127 | |
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| 128 | /** |
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| 129 | * Set client character set |
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| 130 | * |
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| 131 | * @access private |
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| 132 | * @param string |
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| 133 | * @param string |
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| 134 | * @return resource |
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| 135 | */ |
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| 136 | function _db_set_charset($charset, $collation) |
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| 137 | { |
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| 138 | if ( ! isset($this->use_set_names)) |
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| 139 | { |
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| 140 | // mysqli_set_charset() requires MySQL >= 5.0.7, use SET NAMES as fallback |
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| 141 | $this->use_set_names = (version_compare(mysqli_get_server_info($this->conn_id), '5.0.7', '>=')) ? FALSE : TRUE; |
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| 142 | } |
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| 143 | |
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| 144 | if ($this->use_set_names === TRUE) |
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| 145 | { |
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| 146 | return @mysqli_query($this->conn_id, "SET NAMES '".$this->escape_str($charset)."' COLLATE '".$this->escape_str($collation)."'"); |
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| 147 | } |
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| 148 | else |
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| 149 | { |
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| 150 | return @mysqli_set_charset($this->conn_id, $charset); |
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| 151 | } |
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| 152 | } |
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| 153 | |
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| 154 | // -------------------------------------------------------------------- |
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| 155 | |
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| 156 | /** |
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| 157 | * Version number query string |
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| 158 | * |
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| 159 | * @access public |
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| 160 | * @return string |
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| 161 | */ |
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| 162 | function _version() |
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| 163 | { |
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| 164 | return "SELECT version() AS ver"; |
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| 165 | } |
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| 166 | |
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| 167 | // -------------------------------------------------------------------- |
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| 168 | |
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| 169 | /** |
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| 170 | * Execute the query |
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| 171 | * |
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| 172 | * @access private called by the base class |
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| 173 | * @param string an SQL query |
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| 174 | * @return resource |
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| 175 | */ |
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| 176 | function _execute($sql) |
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| 177 | { |
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| 178 | $sql = $this->_prep_query($sql); |
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| 179 | $result = @mysqli_query($this->conn_id, $sql); |
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| 180 | return $result; |
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| 181 | } |
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| 182 | |
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| 183 | // -------------------------------------------------------------------- |
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| 184 | |
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| 185 | /** |
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| 186 | * Prep the query |
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| 187 | * |
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| 188 | * If needed, each database adapter can prep the query string |
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| 189 | * |
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| 190 | * @access private called by execute() |
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| 191 | * @param string an SQL query |
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| 192 | * @return string |
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| 193 | */ |
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| 194 | function _prep_query($sql) |
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| 195 | { |
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| 196 | // "DELETE FROM TABLE" returns 0 affected rows This hack modifies |
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| 197 | // the query so that it returns the number of affected rows |
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| 198 | if ($this->delete_hack === TRUE) |
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| 199 | { |
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| 200 | if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $sql)) |
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| 201 | { |
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| 202 | $sql = preg_replace("/^\s*DELETE\s+FROM\s+(\S+)\s*$/", "DELETE FROM \\1 WHERE 1=1", $sql); |
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| 203 | } |
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| 204 | } |
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| 205 | |
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| 206 | return $sql; |
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| 207 | } |
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| 208 | |
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| 209 | // -------------------------------------------------------------------- |
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| 210 | |
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| 211 | /** |
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| 212 | * Begin Transaction |
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| 213 | * |
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| 214 | * @access public |
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| 215 | * @return bool |
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| 216 | */ |
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| 217 | function trans_begin($test_mode = FALSE) |
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| 218 | { |
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| 219 | if ( ! $this->trans_enabled) |
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| 220 | { |
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| 221 | return TRUE; |
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| 222 | } |
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| 223 | |
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| 224 | // When transactions are nested we only begin/commit/rollback the outermost ones |
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| 225 | if ($this->_trans_depth > 0) |
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| 226 | { |
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| 227 | return TRUE; |
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| 228 | } |
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| 229 | |
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| 230 | // Reset the transaction failure flag. |
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| 231 | // If the $test_mode flag is set to TRUE transactions will be rolled back |
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| 232 | // even if the queries produce a successful result. |
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| 233 | $this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE; |
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| 234 | |
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| 235 | $this->simple_query('SET AUTOCOMMIT=0'); |
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| 236 | $this->simple_query('START TRANSACTION'); // can also be BEGIN or BEGIN WORK |
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| 237 | return TRUE; |
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| 238 | } |
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| 239 | |
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| 240 | // -------------------------------------------------------------------- |
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| 241 | |
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| 242 | /** |
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| 243 | * Commit Transaction |
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| 244 | * |
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| 245 | * @access public |
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| 246 | * @return bool |
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| 247 | */ |
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| 248 | function trans_commit() |
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| 249 | { |
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| 250 | if ( ! $this->trans_enabled) |
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| 251 | { |
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| 252 | return TRUE; |
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| 253 | } |
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| 254 | |
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| 255 | // When transactions are nested we only begin/commit/rollback the outermost ones |
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| 256 | if ($this->_trans_depth > 0) |
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| 257 | { |
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| 258 | return TRUE; |
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| 259 | } |
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| 260 | |
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| 261 | $this->simple_query('COMMIT'); |
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| 262 | $this->simple_query('SET AUTOCOMMIT=1'); |
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| 263 | return TRUE; |
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| 264 | } |
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| 265 | |
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| 266 | // -------------------------------------------------------------------- |
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| 267 | |
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| 268 | /** |
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| 269 | * Rollback Transaction |
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| 270 | * |
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| 271 | * @access public |
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| 272 | * @return bool |
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| 273 | */ |
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| 274 | function trans_rollback() |
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| 275 | { |
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| 276 | if ( ! $this->trans_enabled) |
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| 277 | { |
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| 278 | return TRUE; |
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| 279 | } |
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| 280 | |
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| 281 | // When transactions are nested we only begin/commit/rollback the outermost ones |
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| 282 | if ($this->_trans_depth > 0) |
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| 283 | { |
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| 284 | return TRUE; |
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| 285 | } |
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| 286 | |
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| 287 | $this->simple_query('ROLLBACK'); |
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| 288 | $this->simple_query('SET AUTOCOMMIT=1'); |
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| 289 | return TRUE; |
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| 290 | } |
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| 291 | |
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| 292 | // -------------------------------------------------------------------- |
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| 293 | |
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| 294 | /** |
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| 295 | * Escape String |
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| 296 | * |
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| 297 | * @access public |
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| 298 | * @param string |
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| 299 | * @param bool whether or not the string will be used in a LIKE condition |
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| 300 | * @return string |
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| 301 | */ |
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| 302 | function escape_str($str, $like = FALSE) |
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| 303 | { |
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| 304 | if (is_array($str)) |
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| 305 | { |
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| 306 | foreach ($str as $key => $val) |
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| 307 | { |
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| 308 | $str[$key] = $this->escape_str($val, $like); |
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| 309 | } |
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| 310 | |
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| 311 | return $str; |
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| 312 | } |
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| 313 | |
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| 314 | if (function_exists('mysqli_real_escape_string') AND is_object($this->conn_id)) |
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| 315 | { |
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| 316 | $str = mysqli_real_escape_string($this->conn_id, $str); |
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| 317 | } |
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| 318 | elseif (function_exists('mysql_escape_string')) |
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| 319 | { |
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| 320 | $str = mysql_escape_string($str); |
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| 321 | } |
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| 322 | else |
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| 323 | { |
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| 324 | $str = addslashes($str); |
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| 325 | } |
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| 326 | |
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| 327 | // escape LIKE condition wildcards |
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| 328 | if ($like === TRUE) |
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| 329 | { |
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| 330 | $str = str_replace(array('%', '_'), array('\\%', '\\_'), $str); |
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| 331 | } |
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| 332 | |
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| 333 | return $str; |
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| 334 | } |
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| 335 | |
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| 336 | // -------------------------------------------------------------------- |
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| 337 | |
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| 338 | /** |
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| 339 | * Affected Rows |
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| 340 | * |
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| 341 | * @access public |
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| 342 | * @return integer |
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| 343 | */ |
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| 344 | function affected_rows() |
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| 345 | { |
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| 346 | return @mysqli_affected_rows($this->conn_id); |
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| 347 | } |
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| 348 | |
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| 349 | // -------------------------------------------------------------------- |
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| 350 | |
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| 351 | /** |
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| 352 | * Insert ID |
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| 353 | * |
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| 354 | * @access public |
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| 355 | * @return integer |
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| 356 | */ |
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| 357 | function insert_id() |
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| 358 | { |
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| 359 | return @mysqli_insert_id($this->conn_id); |
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| 360 | } |
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| 361 | |
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| 362 | // -------------------------------------------------------------------- |
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| 363 | |
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| 364 | /** |
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| 365 | * "Count All" query |
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| 366 | * |
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| 367 | * Generates a platform-specific query string that counts all records in |
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| 368 | * the specified database |
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| 369 | * |
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| 370 | * @access public |
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| 371 | * @param string |
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| 372 | * @return string |
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| 373 | */ |
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| 374 | function count_all($table = '') |
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| 375 | { |
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| 376 | if ($table == '') |
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| 377 | { |
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| 378 | return 0; |
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| 379 | } |
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| 380 | |
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| 381 | $query = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE)); |
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| 382 | |
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| 383 | if ($query->num_rows() == 0) |
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| 384 | { |
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| 385 | return 0; |
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| 386 | } |
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| 387 | |
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| 388 | $row = $query->row(); |
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| 389 | $this->_reset_select(); |
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| 390 | return (int) $row->numrows; |
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| 391 | } |
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| 392 | |
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| 393 | // -------------------------------------------------------------------- |
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| 394 | |
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| 395 | /** |
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| 396 | * List table query |
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| 397 | * |
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| 398 | * Generates a platform-specific query string so that the table names can be fetched |
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| 399 | * |
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| 400 | * @access private |
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| 401 | * @param boolean |
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| 402 | * @return string |
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| 403 | */ |
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| 404 | function _list_tables($prefix_limit = FALSE) |
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| 405 | { |
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| 406 | $sql = "SHOW TABLES FROM ".$this->_escape_char.$this->database.$this->_escape_char; |
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| 407 | |
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| 408 | if ($prefix_limit !== FALSE AND $this->dbprefix != '') |
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| 409 | { |
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| 410 | $sql .= " LIKE '".$this->escape_like_str($this->dbprefix)."%'"; |
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| 411 | } |
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| 412 | |
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| 413 | return $sql; |
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| 414 | } |
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| 415 | |
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| 416 | // -------------------------------------------------------------------- |
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| 417 | |
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| 418 | /** |
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| 419 | * Show column query |
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| 420 | * |
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| 421 | * Generates a platform-specific query string so that the column names can be fetched |
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| 422 | * |
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| 423 | * @access public |
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| 424 | * @param string the table name |
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| 425 | * @return string |
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| 426 | */ |
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| 427 | function _list_columns($table = '') |
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| 428 | { |
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| 429 | return "SHOW COLUMNS FROM ".$this->_protect_identifiers($table, TRUE, NULL, FALSE); |
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| 430 | } |
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| 431 | |
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| 432 | // -------------------------------------------------------------------- |
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| 433 | |
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| 434 | /** |
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| 435 | * Field data query |
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| 436 | * |
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| 437 | * Generates a platform-specific query so that the column data can be retrieved |
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| 438 | * |
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| 439 | * @access public |
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| 440 | * @param string the table name |
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| 441 | * @return object |
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| 442 | */ |
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| 443 | function _field_data($table) |
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| 444 | { |
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| 445 | return "DESCRIBE ".$table; |
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| 446 | } |
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| 447 | |
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| 448 | // -------------------------------------------------------------------- |
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| 449 | |
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| 450 | /** |
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| 451 | * The error message string |
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| 452 | * |
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| 453 | * @access private |
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| 454 | * @return string |
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| 455 | */ |
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| 456 | function _error_message() |
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| 457 | { |
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| 458 | return mysqli_error($this->conn_id); |
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| 459 | } |
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| 460 | |
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| 461 | // -------------------------------------------------------------------- |
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| 462 | |
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| 463 | /** |
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| 464 | * The error message number |
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| 465 | * |
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| 466 | * @access private |
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| 467 | * @return integer |
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| 468 | */ |
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| 469 | function _error_number() |
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| 470 | { |
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| 471 | return mysqli_errno($this->conn_id); |
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| 472 | } |
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| 473 | |
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| 474 | // -------------------------------------------------------------------- |
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| 475 | |
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| 476 | /** |
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| 477 | * Escape the SQL Identifiers |
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| 478 | * |
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| 479 | * This function escapes column and table names |
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| 480 | * |
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| 481 | * @access private |
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| 482 | * @param string |
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| 483 | * @return string |
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| 484 | */ |
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| 485 | function _escape_identifiers($item) |
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| 486 | { |
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| 487 | if ($this->_escape_char == '') |
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| 488 | { |
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| 489 | return $item; |
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| 490 | } |
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| 491 | |
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| 492 | foreach ($this->_reserved_identifiers as $id) |
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| 493 | { |
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| 494 | if (strpos($item, '.'.$id) !== FALSE) |
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| 495 | { |
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| 496 | $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item); |
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| 497 | |
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| 498 | // remove duplicates if the user already included the escape |
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| 499 | return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str); |
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| 500 | } |
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| 501 | } |
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| 502 | |
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| 503 | if (strpos($item, '.') !== FALSE) |
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| 504 | { |
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| 505 | $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char; |
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| 506 | } |
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| 507 | else |
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| 508 | { |
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| 509 | $str = $this->_escape_char.$item.$this->_escape_char; |
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| 510 | } |
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| 511 | |
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| 512 | // remove duplicates if the user already included the escape |
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| 513 | return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str); |
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| 514 | } |
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| 515 | |
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| 516 | // -------------------------------------------------------------------- |
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| 517 | |
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| 518 | /** |
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| 519 | * From Tables |
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| 520 | * |
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| 521 | * This function implicitly groups FROM tables so there is no confusion |
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| 522 | * about operator precedence in harmony with SQL standards |
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| 523 | * |
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| 524 | * @access public |
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| 525 | * @param type |
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| 526 | * @return type |
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| 527 | */ |
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| 528 | function _from_tables($tables) |
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| 529 | { |
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| 530 | if ( ! is_array($tables)) |
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| 531 | { |
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| 532 | $tables = array($tables); |
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| 533 | } |
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| 534 | |
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| 535 | return '('.implode(', ', $tables).')'; |
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| 536 | } |
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| 537 | |
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| 538 | // -------------------------------------------------------------------- |
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| 539 | |
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| 540 | /** |
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| 541 | * Insert statement |
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| 542 | * |
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| 543 | * Generates a platform-specific insert string from the supplied data |
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| 544 | * |
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| 545 | * @access public |
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| 546 | * @param string the table name |
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| 547 | * @param array the insert keys |
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| 548 | * @param array the insert values |
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| 549 | * @return string |
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| 550 | */ |
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| 551 | function _insert($table, $keys, $values) |
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| 552 | { |
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| 553 | return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")"; |
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| 554 | } |
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| 555 | |
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| 556 | // -------------------------------------------------------------------- |
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| 557 | |
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| 558 | /** |
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| 559 | * Insert_batch statement |
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| 560 | * |
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| 561 | * Generates a platform-specific insert string from the supplied data |
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| 562 | * |
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| 563 | * @access public |
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| 564 | * @param string the table name |
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| 565 | * @param array the insert keys |
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| 566 | * @param array the insert values |
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| 567 | * @return string |
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| 568 | */ |
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| 569 | function _insert_batch($table, $keys, $values) |
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| 570 | { |
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| 571 | return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES ".implode(', ', $values); |
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| 572 | } |
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| 573 | |
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| 574 | // -------------------------------------------------------------------- |
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| 575 | |
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| 576 | |
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| 577 | /** |
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| 578 | * Replace statement |
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| 579 | * |
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| 580 | * Generates a platform-specific replace string from the supplied data |
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| 581 | * |
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| 582 | * @access public |
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| 583 | * @param string the table name |
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| 584 | * @param array the insert keys |
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| 585 | * @param array the insert values |
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| 586 | * @return string |
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| 587 | */ |
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| 588 | function _replace($table, $keys, $values) |
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| 589 | { |
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| 590 | return "REPLACE INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")"; |
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| 591 | } |
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| 592 | |
---|
| 593 | // -------------------------------------------------------------------- |
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| 594 | |
---|
| 595 | /** |
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| 596 | * Update statement |
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| 597 | * |
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| 598 | * Generates a platform-specific update string from the supplied data |
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| 599 | * |
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| 600 | * @access public |
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| 601 | * @param string the table name |
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| 602 | * @param array the update data |
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| 603 | * @param array the where clause |
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| 604 | * @param array the orderby clause |
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| 605 | * @param array the limit clause |
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| 606 | * @return string |
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| 607 | */ |
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| 608 | function _update($table, $values, $where, $orderby = array(), $limit = FALSE) |
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| 609 | { |
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| 610 | foreach ($values as $key => $val) |
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| 611 | { |
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| 612 | $valstr[] = $key." = ".$val; |
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| 613 | } |
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| 614 | |
---|
| 615 | $limit = ( ! $limit) ? '' : ' LIMIT '.$limit; |
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| 616 | |
---|
| 617 | $orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):''; |
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| 618 | |
---|
| 619 | $sql = "UPDATE ".$table." SET ".implode(', ', $valstr); |
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| 620 | |
---|
| 621 | $sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : ''; |
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| 622 | |
---|
| 623 | $sql .= $orderby.$limit; |
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| 624 | |
---|
| 625 | return $sql; |
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| 626 | } |
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| 627 | |
---|
| 628 | // -------------------------------------------------------------------- |
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| 629 | |
---|
| 630 | /** |
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| 631 | * Update_Batch statement |
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| 632 | * |
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| 633 | * Generates a platform-specific batch update string from the supplied data |
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| 634 | * |
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| 635 | * @access public |
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| 636 | * @param string the table name |
---|
| 637 | * @param array the update data |
---|
| 638 | * @param array the where clause |
---|
| 639 | * @return string |
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| 640 | */ |
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| 641 | function _update_batch($table, $values, $index, $where = NULL) |
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| 642 | { |
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| 643 | $ids = array(); |
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| 644 | $where = ($where != '' AND count($where) >=1) ? implode(" ", $where).' AND ' : ''; |
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| 645 | |
---|
| 646 | foreach ($values as $key => $val) |
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| 647 | { |
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| 648 | $ids[] = $val[$index]; |
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| 649 | |
---|
| 650 | foreach (array_keys($val) as $field) |
---|
| 651 | { |
---|
| 652 | if ($field != $index) |
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| 653 | { |
---|
| 654 | $final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field]; |
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| 655 | } |
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| 656 | } |
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| 657 | } |
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| 658 | |
---|
| 659 | $sql = "UPDATE ".$table." SET "; |
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| 660 | $cases = ''; |
---|
| 661 | |
---|
| 662 | foreach ($final as $k => $v) |
---|
| 663 | { |
---|
| 664 | $cases .= $k.' = CASE '."\n"; |
---|
| 665 | foreach ($v as $row) |
---|
| 666 | { |
---|
| 667 | $cases .= $row."\n"; |
---|
| 668 | } |
---|
| 669 | |
---|
| 670 | $cases .= 'ELSE '.$k.' END, '; |
---|
| 671 | } |
---|
| 672 | |
---|
| 673 | $sql .= substr($cases, 0, -2); |
---|
| 674 | |
---|
| 675 | $sql .= ' WHERE '.$where.$index.' IN ('.implode(',', $ids).')'; |
---|
| 676 | |
---|
| 677 | return $sql; |
---|
| 678 | } |
---|
| 679 | |
---|
| 680 | // -------------------------------------------------------------------- |
---|
| 681 | |
---|
| 682 | /** |
---|
| 683 | * Truncate statement |
---|
| 684 | * |
---|
| 685 | * Generates a platform-specific truncate string from the supplied data |
---|
| 686 | * If the database does not support the truncate() command |
---|
| 687 | * This function maps to "DELETE FROM table" |
---|
| 688 | * |
---|
| 689 | * @access public |
---|
| 690 | * @param string the table name |
---|
| 691 | * @return string |
---|
| 692 | */ |
---|
| 693 | function _truncate($table) |
---|
| 694 | { |
---|
| 695 | return "TRUNCATE ".$table; |
---|
| 696 | } |
---|
| 697 | |
---|
| 698 | // -------------------------------------------------------------------- |
---|
| 699 | |
---|
| 700 | /** |
---|
| 701 | * Delete statement |
---|
| 702 | * |
---|
| 703 | * Generates a platform-specific delete string from the supplied data |
---|
| 704 | * |
---|
| 705 | * @access public |
---|
| 706 | * @param string the table name |
---|
| 707 | * @param array the where clause |
---|
| 708 | * @param string the limit clause |
---|
| 709 | * @return string |
---|
| 710 | */ |
---|
| 711 | function _delete($table, $where = array(), $like = array(), $limit = FALSE) |
---|
| 712 | { |
---|
| 713 | $conditions = ''; |
---|
| 714 | |
---|
| 715 | if (count($where) > 0 OR count($like) > 0) |
---|
| 716 | { |
---|
| 717 | $conditions = "\nWHERE "; |
---|
| 718 | $conditions .= implode("\n", $this->ar_where); |
---|
| 719 | |
---|
| 720 | if (count($where) > 0 && count($like) > 0) |
---|
| 721 | { |
---|
| 722 | $conditions .= " AND "; |
---|
| 723 | } |
---|
| 724 | $conditions .= implode("\n", $like); |
---|
| 725 | } |
---|
| 726 | |
---|
| 727 | $limit = ( ! $limit) ? '' : ' LIMIT '.$limit; |
---|
| 728 | |
---|
| 729 | return "DELETE FROM ".$table.$conditions.$limit; |
---|
| 730 | } |
---|
| 731 | |
---|
| 732 | // -------------------------------------------------------------------- |
---|
| 733 | |
---|
| 734 | /** |
---|
| 735 | * Limit string |
---|
| 736 | * |
---|
| 737 | * Generates a platform-specific LIMIT clause |
---|
| 738 | * |
---|
| 739 | * @access public |
---|
| 740 | * @param string the sql query string |
---|
| 741 | * @param integer the number of rows to limit the query to |
---|
| 742 | * @param integer the offset value |
---|
| 743 | * @return string |
---|
| 744 | */ |
---|
| 745 | function _limit($sql, $limit, $offset) |
---|
| 746 | { |
---|
| 747 | $sql .= "LIMIT ".$limit; |
---|
| 748 | |
---|
| 749 | if ($offset > 0) |
---|
| 750 | { |
---|
| 751 | $sql .= " OFFSET ".$offset; |
---|
| 752 | } |
---|
| 753 | |
---|
| 754 | return $sql; |
---|
| 755 | } |
---|
| 756 | |
---|
| 757 | // -------------------------------------------------------------------- |
---|
| 758 | |
---|
| 759 | /** |
---|
| 760 | * Close DB Connection |
---|
| 761 | * |
---|
| 762 | * @access public |
---|
| 763 | * @param resource |
---|
| 764 | * @return void |
---|
| 765 | */ |
---|
| 766 | function _close($conn_id) |
---|
| 767 | { |
---|
| 768 | @mysqli_close($conn_id); |
---|
| 769 | } |
---|
| 770 | |
---|
| 771 | |
---|
| 772 | } |
---|
| 773 | |
---|
| 774 | |
---|
| 775 | /* End of file mysqli_driver.php */ |
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| 776 | /* Location: ./system/database/drivers/mysqli/mysqli_driver.php */ |
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