<?php
$domain = "http://seanbehan.com";
$pattern = "/\bhref=[\"|'](.*?)[\"|']/";
$string = file_get_contents($domain);

// prepends relative links w/ $domain skips returns the match if already absolute
function replace_href($match){
  global $domain;
  if(substr($match[1], 0, 7)!=="http://" && substr($match[1],0,8)!=="https://"){
    return "href='".$domain.$match[1]."'";
  } else {
    return "href='".$match[1]."'s";
  }
}
print preg_replace_callback($pattern, "replace_href", $string);

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