PHP Match Url – String Function

<?php  $hostRegex = "([a-z\d][-a-z\d]*[a-z\d]\.)*[a-z][-a-z\d]*[a-z]";
  $portRegex = "(:\d{1,})?";
  $pathRegex = "(\/[^\s?]+)?";
  $queryRegex = "(\?[^<>#\"\s]+)?";  $urlRegex = "/(?:(?<=^)|(?<=\s))((ht|f)tps?:\/\/" . $hostRegex . $portRegex . $pathRegex . $queryRegex . ")/";  $str = "This is my homepage:  http://home.example.com.";
  $str2 = "This is my homepage:  http://home.example.com:8181/index.php";  $sample1 = preg_replace($urlRegex, "<a href=\"\\1\">\\1</a>", $str);
  $sample2 = preg_replace($urlRegex, "<a href=\"\\1\">\\1</a>", $str2);  echo $sample1 . "\n";
  echo $sample2 . "\n";?>

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