Replacing URLs with Links : preg_replace « String « PHP

Replacing URLs with Links


    $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 = "";
    $str2 = "";

    echo $urlRegex . "\n";

    $sample1 = preg_replace($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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