计算页面执行时间
很多网站,论坛啊,底部都有页面加载执行完成所需要的时间,这点可以反映程序性能网速等。其实实现这个功能非常简单.
下面实例代码:
<?php function microtime_float(){ list($usec,$sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec);//$usec微秒,$sec秒数 两者单位均为秒 } $time_start = microtime_float(); $time_start1=microtime(true); usleep(100);//delay 100microseconds $time_end = microtime_float(); $time_end1=microtime(true); $time = $time_end - $time_start; echo "Did nothing in $time seconds <br/>"; echo "<br/>精确点的:<br/>$time_end - $time_start=".($time_end - $time_start); echo "<hr/>"; echo "不够精确的:<br/>$time_end1 - $time_start1=".($time_end1 - $time_start1); ?>