1. <?php
2. $domains =  array(
3.             'shop1.com'=>'11111',  
4.             'shop2.com'=>'1112',  
5.         );
6. $dangerouschars  = array(
7.   '.'=>'\.',
8.  
9. );
10. function wpso_change_urls( $content ) {
11.    global $domains,$dangerouschars;
12.    foreach($domains as $domain=>$id){
13.       $escapedDomain = str_replace(array_keys($dangerouschars),array_values($dangerouschars), $domain);
14.  
15.      if (preg_match_all('/=\s*"(\s*https?:\/\/(www\.)?'.$escapedDomain.'[^"]+)\s*"\s+/mi', $content, $matches)){
16.         // $matches[0] - ="https://example.com"
17.         // $matches[1] - https://example.com
18.         for($i = 0; $i<count($matches[0]); $i++){
19.                 $matchedUrl = $matches[1][$i];
20.                 $url = rawurlencode($matchedUrl);
21.                 //is very important to replace with ="..."
22.                 $content = str_replace($matches[0][$i], "=\"https://www.network-x.com/click/{$id}lorem_lorem={$url}\" ", $content);
23.         }
24.      }
25.    }
26.    return $content;
27. }
28.  
29. var_dump(wpso_change_urls('href="https://shop1.com/123" asdasd"""dasdasd<><> href="https://shop2.com/345" '));