php中計算程式運行時間的類別程式碼

複製程式碼 程式碼如下: 
class Timer { 
private $StartTime = 0;//程式運作開始時間 
private $StopTime = 0;//程式運作結束時間 
private $TimeSpent = 0;//程式執行時間function start(){//程式運作開始 
$this->StartTime = microtime(); 
} 
function stop(){//程式運作結束 
$this->StopTime = microtime(); 
} 
$this->StopTime = microtime(); 
} (){//程式運作所花費的時間 
if ($this->TimeSpent) { 
return $this->TimeSpent; 
} else { 
list($StartMicro, $StartSecond) = explode(" ", $this-this-this- >StartTime); 
list($StopMicro, $StopSecond) = explode(" ", $this->StopTime); 
$start = doubleval($StartMicro) + $StartSecond; 
$stop = doubleval($StopMicro) + $StartSecond; 
$stop = doubleval($StopMicro) + $ StopSecond; 
$this->TimeSpent = $stop - $start; 
return substr($this->TimeSpent,0,8)."秒";//返回取得到的程式運行時間差 
} 
} 
} 
} $timer = new Timer(); 
$timer->start(); 
//...程式運作的程式碼 
$timer->stop();