求一段程序，实现用一字符串代替另一字符串

Question

求一段程序或函数，实现用一字符串代替另一字符串例如字符串: string(delete)fdf
 用’new123’替换掉上述字符串括号的内容实现替换后的字符串: stringnew123fdf

Answer 1

str_replace('(delete)','new123','string(delete)fdf');

Answer 2

str_replace('(delete)','new123','string(delete)fdf');

Answer 3

str_replace('(delete)','new123','string(delete)fdf');

Answer 4

//正则替换
preg_replace("/(\([^\(\\)]+\))/i", 'new123','string(delete)fdf');//如果还想要被替换的串
$str = "string(delete)fdf";
if(preg_match("/(\([^\(\)]+\))/i", $str, $matches))
{
//$matches[1]为你要替换的串
echo str_replace($matches[1], "", $str);
}

Answer 5

一个比较笨的方法，但是容易理解：
<?php $my_string = "string(delete)fdf";$replace_str = "new123";$pos_start = stripos($my_string, "(");
$pos_end = stripos($my_string, ")");$length = $pos_end-$pos_start+1; $result = substr_replace($my_string,$replace_str,$pos_start,$length);echo $result;?>