class runtime { var $StartTime = 0; var $StopTime = 0; function get_microtime() { list($usec, $sec) = explode(‘ ‘, microtime()); return ((float)$usec + (float)$sec); } function start() { $this->StartTime = $this->get_microtime(); } function stop() { $this->StopTime = $this->get_microtime(); } function spent() { return round(($this->StopTime - $this->StartTime) * 1000, 1); } }
$run_time = new runtime(); $run_time->start(); //begin your code //end your code $run_time->stop(); echo "Script running time:".$run_time->spent()."ms";
原文：http://www.cnblogs.com/jiechn/p/3958090.html