<?php
$domains =  array(
            'shop1.com'=>'11111',  
            'shop2.com'=>'1112',  
        );
$dangerouschars  = array(
  '.'=>'\.',
 
);
function wpso_change_urls( $content ) {
   global $domains,$dangerouschars;
   foreach($domains as $domain=>$id){
      $escapedDomain = str_replace(array_keys($dangerouschars),array_values($dangerouschars), $domain);

     if (preg_match_all('/=\s*"(\s*https?:\/\/(www\.)?'.$escapedDomain.'[^"]+)\s*"\s+/mi', $content, $matches)){
        // $matches[0] - ="https://example.com"
        // $matches[1] - https://example.com
        for($i = 0; $i<count($matches[0]); $i++){
                $matchedUrl = $matches[1][$i];
                $url = rawurlencode($matchedUrl);
                //is very important to replace with ="..."
                $content = str_replace($matches[0][$i], "=\"https://www.network-x.com/click/{$id}lorem_lorem={$url}\" ", $content);
        }
     }
   }
   return $content;
}
 
var_dump(wpso_change_urls('href="https://shop1.com/123" asdasd"""dasdasd<><> href="https://shop2.com/345" '));