PHP中strtr与str_replace函数性能对比?相信很多没有经验的人对此束手无策,为此本文总结了问题出现的原因和解决方法,通过这篇文章希望你能解决这个问题。
代码如下:
<?php require_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:
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