PHP cron::lock示例

require_once 'PSUWordPress.php';
if (substr(php_sapi_name(), 0, 3) == 'cli') {
    $config = new PSU\Config();
    $config->load();
    $GLOBALS['BASE_DIR'] = dirname(__FILE__) . '/..';
    $GLOBALS['BASE_URL'] = $config->get('ape', 'base_url');
    $GLOBALS['TEMPLATES'] = $GLOBALS['BASE_DIR'] . '/templates';
    $command_line = true;
    require_once $GLOBALS['BASE_DIR'] . '/includes/HRChecklist.class.php';
    $cron = new cron('checklist-trigger', 'page_threshold=20');
    if ($cron->checkLock()) {
        $cron->log('Employee Exit Checklist Trigger is already running');
        exit;
    }
    //end if
    $cron->lock();
}
//end if
$time = time();
$one_month_ago = strtotime('-1 month');
$sql = "SELECT * FROM v_emp_clearance_candidates";
if ($results = PSU::db('banner')->Execute($sql)) {
    foreach ($results as $row) {
        if ($checklist = HRChecklist::get($row['pidm'], 'employee-exit')) {
            if ($checklist['position_code'] == $row['position_code'] && strtotime($checklist['activity_date']) >= $one_month_ago) {
                continue;
            }
            //end if
        }
        //end if
        $person = PSUPerson::get($row['pidm']);