检查给定的代码是否正确？ 通过正则表达式检查（PHP）

Question

I'm providing a backlink selling service, but I have problem while checking the sold links on publisher web sites. For example I want to check

<a href="http://www.example.com" title="example">example</a>

I can check this but some users add target="_blank" some of them target="_new" ... The code's structure is changing by the webmaster.

I want to check the codes with regex. The Regex should check href="" , title="" and between the a tags ( <a>here</a> ).

Answer 1

I've made you this:

$str = "<a onclick=\"foo()\" href=\"http://www.example.com\" title=\"example\">example</a>" ;

function url_grab( $html )
{
    preg_match( "/<a\s+.*href=(\"|')([^\\1]+)(\\1).*>(.+)<\/a>/U" , $html , $m ) ;
    return array( $m[ 2 ] , $m[ 4 ] ) ;
}

// test it
var_dump( url_grab( $str ) ) ;

output:

array(2) {
  [0]=>
  string(22) "http://www.example.com"
  [1]=>
  string(7) "example"
}

Answer 2

Use this parser instead of regular expressions, which are cool but the wrong tool for this job.