统计PHP代码的执行时间

执行PHP运行时间统计的代码大家看看吧,话不多看代码
class TimeMark{private $last;private $n;public function start(){$this->last = microtime(true);$this->n = 1;}public function mark($name){$now = microtime(true);$name = str_replace(' ', '-', $name);header("X-mark-{$this->n}-{$name}:" . ($now-$this->last));$this->last = $now;++ $this->n;}}

 

示例:

$mark = new TimeMark();$mark->start();$s = '';for($i=0;$i<10000;++$i){$s .= '****';}$mark->mark('concat with for loop');$s = str_repeat('****', 10000);$mark->mark('str_repeat'); 

 

打印结果

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X-mark-1-concat-with-for-loop 0.0038130283355713 
X-mark-2-str_repeat 0.00021910667419434