  <?php 

  $input = $block -> content;
  $regexp = "<a\s[^>]*href=(\"??)([^\" >]*?)\\1[^>]*>(.*)<\/a>";
  if(preg_match_all("/$regexp/siU", $input, $matches)) {}
  
  $url = $matches['2']['0'];
  $img = $matches['3']['0'];
  
  ?>