如何找到PHP执行时间？

Question

我的网站上有一个很大的PHP代码,我想知道处理的执行时间.我怎样才能做到这一点？

<?php
// large code
// large code
// large code

// print execution time here
?>

Answer 1

您可以将其microtime用作PHP代码的开头和结尾:

<?php
    $time_start = microtime(true);
    sleep(1);
    $time_end = microtime(true);
    $time = $time_end - $time_start;
    echo "Process Time: {$time}";
    // Process Time: 1.0000340938568
?>

从PHP 5.4.0开始,没有必要在开始时获得开始时间,$_SERVER超全局数组已经拥有它:

<?php
    sleep(1);
    $time = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];
    echo "Process Time: {$time}";
    // Process Time: 1.0061590671539
?>