source: pro-violet-viettel/www/deploy/20150304/service.php

<?php 
if ( ! defined('_SBG_MO_REGISTER'))                     define('_SBG_MO_REGISTER',                              'SUBSCR');
if ( ! defined('_SBG_MO_REGISTER_FOR'))                 define('_SBG_MO_REGISTER_FOR',                  'SUBSCR_FOR');
if ( ! defined('_SBG_MO_PHONENUM_CHANGE'))              define('_SBG_MO_PHONENUM_CHANGE',               'PHONE_CHANGE');
if ( ! defined('_SBG_MO_PASSWORD_RECOVERY'))    define('_SBG_MO_PASSWORD_RECOVERY',     'PWD_RECOVER');
if ( ! defined('_SBG_MO_PASSWORD_CHANGE'))              define('_SBG_MO_PASSWORD_CHANGE',               'PWD_CHANGE');
if ( ! defined('_SBG_MO_VIP_REGISTER'))                 define('_SBG_MO_VIP_REGISTER',                  'REG_VIP');
if ( ! defined('_SBG_MO_PAY_TO_ACCOUNT'))               define('_SBG_MO_PAY_TO_ACCOUNT',                'PAY');
if ( ! defined('_SBG_MO_PAY_TO_ACCOUNT_FOR'))   define('_SBG_MO_PAY_TO_ACCOUNT_FOR',    'PAY_FOR');
if ( ! defined('_SBG_MO_UNSUBSCRIBE_SERVICE'))  define('_SBG_MO_UNSUBSCRIBE_SERVICE',   'UNSUBSCR');
if ( ! defined('_SBG_MO_SUPPOR_SERVICE'))               define('_SBG_MO_SUPPOR_SERVICE',                'SUPPORT');
if ( ! defined('_SBG_MO_SYNTAX_ERR'))                   define('_SBG_MO_SYNTAX_ERR',                    'SYNTAX_ERR');

Class Services_model
{
        private $_arySmsMO = array(
                _SBG_MO_REGISTER                        => array('pattern' => '/^(DK)([[:blank:]])(SBG)$/'),
                _SBG_MO_REGISTER_FOR            => array('pattern' => '/^(DK)([[:blank:]])(SBG)([[:blank:]])([0-9]{10,11})$/'),
                _SBG_MO_PHONENUM_CHANGE         => array('pattern' => '/^(DDT)([[:blank:]])(SBG)([[:blank:]])([0-9]{10,11})([[:blank:]])([a-zA-Z0-9]{1,})$/'),
                _SBG_MO_PASSWORD_RECOVERY       => array('pattern' => '/^(MK)([[:blank:]])(SBG)$/'),
                _SBG_MO_VIP_REGISTER            => array('pattern' => '/^(VIP)([[:blank:]])(SBG)([[:blank:]])([a-zA-Z0-9]{1,})$/'),
                _SBG_MO_PAY_TO_ACCOUNT          => array('pattern' => '/^(NAP)([[:blank:]])(SBG)([[:blank:]])([0-9]{3,})$/'),
                _SBG_MO_PAY_TO_ACCOUNT_FOR      => array('pattern' => '/^(NAP)([[:blank:]])(SBG)([[:blank:]])([0-9]{3,})([[:blank:]])([0-9]{10,11})$/'),
                _SBG_MO_SUPPOR_SERVICE          => array('pattern' => '/^(HD)([[:blank:]])(SBG)$/'),
                _SBG_MO_UNSUBSCRIBE_SERVICE => array('pattern' => '/^(HUY)([[:blank:]])(SBG)$/')
        );
        
        public function __construct(){
                //parent::__construct();
        }
        
        public function messageAnalys ($message)
        {
                $aryMatched = array();  
                $aryContent = array();
                $result = FALSE;
                
                foreach ($this->_arySmsMO as $case => $pattern)
                {
                        $result = preg_match($pattern['pattern'], strtoupper(trim($message)));
                        if ((bool)$result) {
                                $aryMatched = explode(' ', trim($message));
                                break;
                        }
                }
                
                $case = (bool)$result ? $case:_SBG_MO_SYNTAX_ERR;
                
                foreach($aryMatched as $k => $val) {
                        if ($k > 1) $aryContent[] = $val;                       
                }
                
                $aryResult = array('case' => $case, 'content' => $aryContent);
                return $aryResult;
        }
}

$mo = new Services_model();

var_dump($mo->messageAnalys('NAP SBG 15000 0988568786'));