phpdate函数使用方法
PHP中strtr与str_replace函数运行性能简单测试示例本文实例讲述了php中strtr与str_replace函数运行性能简单测试。分享给大家供大家参考，具体如下：
strtr与str_replace函数性能，很简单的一个测试，只是简单的测下，供参考，代码如下：
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<?phprequire_once('timer.php');$target = 'qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./qwertyuiop[]asdfghjkl;\'zxcvbnm,./';$count = isset($argv[1]) ? (int)$argv[1] : 1;$needle = 'vb';timer::getinstance()->begin();for($i = 0; $i < $count; $i++) { strtr($target, $needle, '*');}echo "strtr exec {$count} times used time: " . timer::getinstance()->end()->gone() . " sec.\n";//----------------------------------------------------------------------------------------------timer::getinstance()->begin();for($i = 0; $i < $count; $i++) { str_replace($needle, '*', $target);}echo "str_replace exec {$count} times used time: " . timer::getinstance()->end()->gone() . " sec.\n"; |
结果如下：
那个正则替换的那个就不测了，应该是赶不上这两个的。
希望本文所述对大家php程序设计有所帮助。
原文链接：https://blog.csdn.net/dclnet/article/details/48551657