php实现字符串替换

一、总结

 

 

二、php实现字符串替换

代码一:



1 //字符串替换  
2 function str_replace($substr , $newsubstr, $str)
3 {
4 $m = strlen($str);
5 $n = strlen($substr );
6 $x = strlen($newsubstr );
7 if (strchr($str, $substr ) == false) return false; //查找字符串
8 for ( $i=0; $i<=($m- $n+1); $i++){
9 $i = strchr($str, $substr);
10 $str = str_delete ($str, $i, $n); //删除字符串
11 $str = str_insert($str, $i, $newstr); //插入字符串
12 }
13 return $str ;
14 }


 

 

 

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