Please take a look at what is wrong with this regular expression? -Php Tutorial

Please take a look at what is wrong with this regular expression ?? This post is finally edited by dz215136304 from 2012-07-0508: 54: 58. the hyperlink in & nbsp; href in the string $ str & nbsp; is extracted, replace the extracted hyperlink with go. php? Id number. otherwise, replace it with # and put the replaced link back to its original location. the current situation is to be a master. what is wrong with this regular expression ??

This post was last edited by dz215136304 at 08:54:58

Requirement: extract the hyperlink from the href in the string $ str. if the extracted hyperlink contains "id = number", replace it with go. php? Id = number. otherwise, replace it with # and put the replaced link back to its original location. the current situation is that although it can be extracted, but I replaced all the labels when I put them back to the original position. now I only want to replace the URLs in href. what is the error ??

$ Str = '';


$ Str = preg_replace ('[a-zA-z] +: // [^ \ s] *', 'endecode: showdescurl ("$2 ")', $ str );

Echo $ str;


The static method of the endecode class: showdescurl code is as follows:

static function showdescurl($url){
 if(strpos($url,'id') !==false){
        preg_match('/id=(\d+)/i',$url,$ar);
        return  'go.php?id='.$ar[1];
     }else{
        return '#';     
     }  

}

------ Solution --------------------
$ Str = preg_replace ('#(? <= Href ...) ([a-zA-z] +: //) ([^ \ '"] *) # e', 'endecode: showdescurl (" $2 ")', $ str );