timer.php

См. документацию.

<?php
 
namespace Bitrix\Sale\TradingPlatform;

class Timer
{
    protected $finishTime;
    protected $timeLimit;

    public function __construct($newTimeLimit = 0, $increaseTimeLimit = true)
    {
        $startTime = (int)time();
        $currentTimeLimit = ini_get('max_execution_time');
 
        if($newTimeLimit > $currentTimeLimit || $newTimeLimit == 0)
            $timeLimit = $newTimeLimit;
        else
            $timeLimit = $currentTimeLimit;
 
        $this->timeLimit = $timeLimit;
        if($increaseTimeLimit) {
            $this->finishTime =  $startTime + (int)($timeLimit);
            @set_time_limit($timeLimit);
        }
        else {
            $this->finishTime =  $startTime + (int)($newTimeLimit);
        }
 
    }

    public function check($reserveTime = 0)
    {
        if($this->timeLimit == 0)
            return true;
 
        if(time() < $this->finishTime - $reserveTime)
            return true;
 
        return false;
    }
}