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：
<?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：
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。
