source: pro-violet-viettel/sourcecode/application/helpers/lockfile_helper.php @ 737

<?php 

if ( ! function_exists('createLockFile'))
{
        function createLockFile ($lockFilePrefix, $maxReach, $timeToUnlock, $lockFilePath = '', $checkLockOnly = FALSE, $colSep = '|')
        {
                $currentTimeStamp = time();
                $filePath = $lockFilePath.$lockFilePrefix.'_lock';
                $fileExisted = file_exists($filePath);
                $content = '';
                $lastTimeLock = '';
                $lockCount = 0;
                $isLocked = 0;
                $ready = 0;
        
                if ($fileExisted) {
                        $content = file_get_contents($filePath);
                }
        
                if ($content != '') {
                        list($lockCount, $lastTimeLock, $isLocked) = explode ($colSep, $content);
                }
        
                $timeDiffMin = $lastTimeLock != '' ? dateDifference(date('Y-m-d H:i:s',$currentTimeStamp), date('Y-m-d H:i:s',$lastTimeLock), '%i') : 0;

                if ($lockCount < $maxReach && $timeDiffMin < $timeToUnlock && !$checkLockOnly) {
                        $lockCount ++;
                        $isLocked = $lockCount < $maxReach ? 0:1;
                        $ready = 1;
                }
                else if ($timeDiffMin > $timeToUnlock) {
                        $lockCount = 1;
                        $isLocked = 0;
                        $ready = 1;
                }
        
                $lockTime = ($isLocked == 1) ? $lastTimeLock : $currentTimeStamp;
                $content = $lockCount . $colSep . $lockTime . $colSep . $isLocked;
                
                if($ready == 1 && !$checkLockOnly) {
                        $fh = fopen ($filePath,'w');
                        fwrite ($fh, $content);
                        fclose ($fh);
                }
        
                return (int)$isLocked;
        }
}

if ( ! function_exists('releaseLockFile'))
{
        function releaseLockFile ($lockFilePrefix, $lockFilePath = '')
        {
                $filePath = $lockFilePath.$lockFilePrefix.'_lock';
                $fileExisted = file_exists($filePath);
                if ($fileExisted) {
                        unlink($filePath);
                }
        }
}

/**
 * dateDifference
 * Return difference between two dates
 *
 * @access      public
 * @param       date    date_1
 * @param       date    date_2
 * @param       string  differenceFormat ()
 * @return      string
 *
 * @example '%y Year %m Month %d Day %h Hours %i Minute %s Seconds', %y Year %m Month %d Day','%m Month %d Day'
 * @example '%d Day %h Hours', '%d Day', '%h Hours %i Minute %s Seconds', '%i Minute %s Seconds','%h Hours', '%a Days'
 */

if ( ! function_exists('dateDifference'))
{
        function dateDifference($date_1 , $date_2 , $differenceFormat = '%a' )
        {
                $datetime1 = date_create($date_1);
                $datetime2 = date_create($date_2);

                $diff = date_diff($datetime1, $datetime2);
                //$diff = DateTime::diff($datetime1, $datetime2);
                $total = 0;
                switch( $differenceFormat){
                        case "%y":
                                $total = $diff->y + $diff->m / 12 + $diff->d / 365.25; break;
                        case "%m":
                                $total= $diff->y * 12 + $diff->m + $diff->d/30 + $diff->h / 24;
                                break;
                        case "%a":
                                $total = $diff->y * 365.25 + $diff->m * 30 + $diff->d + $diff->h/24 + $diff->i / 60;
                                break;
                        case "%h":
                                $total = ($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h + $diff->i/60;
                                break;
                        case "%i":
                                $total = (($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h) * 60 + $diff->i + $diff->s/60;
                                break;
                        case "%s":
                                $total = ((($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h) * 60 + $diff->i)*60 + $diff->s;
                                break;
                }
                
                return (int)$total;
                /* if( $diff->invert)
                        return -1 * $total;
                else    return $total; */
        }
}

if(!function_exists('date_diff')) {
  class DateInterval {
    public $y;
    public $m;
    public $d;
    public $h;
    public $i;
    public $s;
    public $invert;
    public $days;
 
    public function format($format) {
      $format = str_replace('%R%y', 
        ($this->invert ? '-' : '+') . $this->y, $format);
      $format = str_replace('%R%m', 
         ($this->invert ? '-' : '+') . $this->m, $format);
      $format = str_replace('%R%d', 
         ($this->invert ? '-' : '+') . $this->d, $format);
      $format = str_replace('%R%h', 
         ($this->invert ? '-' : '+') . $this->h, $format);
      $format = str_replace('%R%i', 
         ($this->invert ? '-' : '+') . $this->i, $format);
      $format = str_replace('%R%s', 
         ($this->invert ? '-' : '+') . $this->s, $format);
 
      $format = str_replace('%y', $this->y, $format);
      $format = str_replace('%m', $this->m, $format);
      $format = str_replace('%d', $this->d, $format);
      $format = str_replace('%h', $this->h, $format);
      $format = str_replace('%i', $this->i, $format);
      $format = str_replace('%s', $this->s, $format);
 
      return $format;
    }
  }
 
  function date_diff(DateTime $date1, DateTime $date2) {
 
    $diff = new DateInterval();
 
    if($date1 > $date2) {
      $tmp = $date1;
      $date1 = $date2;
      $date2 = $tmp;
      $diff->invert = 1;
    } else {
      $diff->invert = 0;
    }
 
    $diff->y = ((int) $date2->format('Y')) - ((int) $date1->format('Y'));
    $diff->m = ((int) $date2->format('n')) - ((int) $date1->format('n'));
    if($diff->m < 0) {
      $diff->y -= 1;
      $diff->m = $diff->m + 12;
    }
    $diff->d = ((int) $date2->format('j')) - ((int) $date1->format('j'));
    if($diff->d < 0) {
      $diff->m -= 1;
      $diff->d = $diff->d + ((int) $date1->format('t'));
    }
    $diff->h = ((int) $date2->format('G')) - ((int) $date1->format('G'));
    if($diff->h < 0) {
      $diff->d -= 1;
      $diff->h = $diff->h + 24;
    }
    $diff->i = ((int) $date2->format('i')) - ((int) $date1->format('i'));
    if($diff->i < 0) {
      $diff->h -= 1;
      $diff->i = $diff->i + 60;
    }
    $diff->s = ((int) $date2->format('s')) - ((int) $date1->format('s'));
    if($diff->s < 0) {
      $diff->i -= 1;
      $diff->s = $diff->s + 60;
    }
 
    $start_ts   = $date1->format('U');
    $end_ts   = $date2->format('U');
    $days     = $end_ts - $start_ts;
    $diff->days  = round($days / 86400);
 
    if (($diff->h > 0 || $diff->i > 0 || $diff->s > 0))
      $diff->days += ((bool) $diff->invert)
        ? 1
        : -1;
 
    return $diff;
 
  }
 
}