PHP Calculation Script Execution time

//Modify the default time zone for PHPDate_default_timezone_get (' PRC ');//Use subtle calculation of PHP script execution timeEchoMicrotime ();Echo"returns the current UNIX timestamp and number of microseconds";Echo"
"; classTimer{Private$startTime;Private$stopTime; function__construct(){$this->starttime=0;$this->stoptime=0; } functionstart(){$this->starttime=microtime (true); } functionstop(){$this->stoptime=microtime (true); } functionspent(){returnRound (($this->stoptime-$this->starttime),4); }}$timer=NewTimer ();$timer->start (); Usleep ( +);$timer->stop ();Echo"When executing this script " . $timer->spent (). "Seconds
";

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