php+mysql prepare 与普通查询的性能对比实例讲解

php+mysql prepare 与普通查询的性能对比 实例代码如下: <?php class timer { public $StartTime = 0; public $StopTime = 0; public $TimeSpent = 0; function start(){ $this->StartTime = microtime(); } function stop(){ $this->StopTime = microtime(); } function spent()