创建文件loadtime.php

<?php
class loadTime{
    private $time_start     =   0;
    private $time_end       =   0;
    private $time           =   0;
    public function __construct(){
        $this->time_start= microtime(true);
    }
    public function __destruct(){
        $this->time_end = microtime(true);
        $this->time = $this->time_end - $this->time_start;
        echo "Loaded in $this->time seconds\n";
    }
}

而不是在<?PHP: loadtime.php美元loadtime = new loadtime ();

当页面加载结束时，会写“加载在x秒内”

看()。

这里有一个函数，可以计时PHP代码的任何部分的执行，很像Python的timeit模块:https://gist.github.com/flaviovs/35aab0e85852e548a60a

如何使用:

include('timeit.php');
const SOME_CODE = '
        strlen("foo bar");
';
$t = timeit(SOME_CODE);
print "$t[0] loops; $t[2] per loop\n";

结果:

$ php x.php 
100000 loops; 18.08us per loop

免责声明:我是本文主旨的作者

EDIT: timeit现在是https://github.com/flaviovs/timeit上一个独立的、独立的项目

我想分享一下我的功能。希望能帮你节省时间。

它最初用于跟踪基于文本的脚本的时间，因此输出是文本形式的。但如果您愿意，可以轻松地将其修改为HTML。

它将为您计算自脚本开始和在每个步骤中花费了多少时间。它将所有输出格式化为3个精度小数。(精确到毫秒。)

一旦将它复制到脚本的顶部，所要做的就是将recordTime函数调用放在想要计时的每个片段之后。

复制到你的脚本文件的顶部:

$tRecordStart = microtime(true);
header("Content-Type: text/plain");
recordTime("Start");

function recordTime ($sName) {
  global $tRecordStart;
  static $tStartQ;
  $tS = microtime(true);
  $tElapsedSecs = $tS - $tRecordStart;
  $tElapsedSecsQ = $tS - $tStartQ;
  $sElapsedSecs = str_pad(number_format($tElapsedSecs, 3), 10, " ", STR_PAD_LEFT);
  $sElapsedSecsQ = number_format($tElapsedSecsQ, 3);
  echo "//".$sElapsedSecs." - ".$sName;
  if (!empty($tStartQ)) echo " In ".$sElapsedSecsQ."s";
  echo "\n";
  $tStartQ = $tS;
}

想要记录时间的流逝，你可以这样做:

recordTime("What We Just Did")

例如:

recordTime("Something Else")
//Do really long operation.
recordTime("Really Long Operation")
//Do a short operation.
recordTime("A Short Operation")
//In a while loop.
for ($i = 0; $i < 300; $i ++) {
  recordTime("Loop Cycle ".$i)
}

给出如下输出:

//     0.000 - Start
//     0.001 - Something Else In 0.001s
//    10.779 - Really Long Operation In 10.778s
//    11.986 - A Short Operation In 1.207s
//    11.987 - Loop Cycle 0 In 0.001s
//    11.987 - Loop Cycle 1 In 0.000s
...
//    12.007 - Loop Cycle 299 In 0.000s

希望这能帮助到一些人!

如果你想以秒为单位显示时间:

<?php

class debugTimer
{
    private $startTime;
    private $callsCounter;

    function __construct()
    {
        $this->startTime = microtime(true);
        $this->callsCounter = 0;
    }

    public function getTimer(): float
    {
        $timeEnd = microtime(true);
        $time = $timeEnd - $this->startTime;
        $this->callsCounter++;
        return $time;
    }

    public function getCallsNumber(): int
    {
        return $this->callsCounter;
    }
}

$timer = new debugTimer();
usleep(100);
echo '<br />\n
    ' . $timer->getTimer() . ' seconds before call #' . $timer->getCallsNumber();

usleep(100);
echo '<br />\n
    ' . $timer->getTimer() . ' seconds before call #' . $timer->getCallsNumber();

下面是我用来测量平均时间的脚本

<?php

$times = [];
$nbrOfLoops = 4;
for ($i = 0; $i < $nbrOfLoops; ++$i) {
    $start = microtime(true);
    sleep(1);
    $times[] = microtime(true) - $start;
}

echo 'Average: ' . (array_sum($times) / count($times)) . 'seconds';