source: pro-violet-viettel/sourcecode/service.php @ 628

<?php 

function createLockFile ($lockFilePrefix, $maxReach, $timeToUnlock, $colSep = '|') 
{
        $currentTimeStamp = time();
        $filePath = $lockFilePrefix.'_lock';
        $fileExisted = file_exists($filePath);
        $content = '';
        $lastTimeLock = '';
        $lockCount = 0;
        $isLocked = 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) {
                $lockCount ++;
                $isLocked = $lockCount < $maxReach ? 0:1;
        }
        else if ($timeDiffMin > $timeToUnlock) {
                $lockCount = 0;
                $isLocked = 0;
        }
        
        $lockTime = ($isLocked == 1) ? $lastTimeLock : $currentTimeStamp;
        $content = $lockCount . $colSep . $lockTime . $colSep . $isLocked;
        $fh = fopen ($filePath,'w');
        fwrite ($fh, $content);
        fclose ($fh);
        
        return $timeDiffMin;
}

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

function dateDifference($date_1 , $date_2 , $differenceFormat = '%a' )
{
        $datetime1 = date_create($date_1);
        $datetime2 = date_create($date_2);
        $interval = date_diff($datetime1, $datetime2);
        return $interval->format($differenceFormat);
}

$username = '0988568786';
$maxReach = 3;
$timeToUnlock = 1;
echo createLockFile($username, $maxReach, $timeToUnlock);
releaseLockFile ($username);