strpos的代碼實現

<?php $a = 'hello world'; $b = 'e'; $len = strlen($a); $len1 = strlen($b); for($n=0;$n<$len;$n++){ for($j=0;$j<=$len1;$j++){ if(isset($b[$j]) && $a[$n] == $b[$j]){ echo $n; die

>>阅读原文<<