Ticket #3228: make_clickable.php

<?php

$sentence = <<<EOF
<p>http://example.com/ is a link.  So is: http://example.com/</p>
<p><a href="http://example.com/">example.com</a></p>
<p>www.example.com/signup/</p>
<p>ftp.example.org</p>
<p>example@example.com</p>
<p>ftp://example.com/foo/bar/</p>
EOF;


function make_clickable_old($ret) {
        $ret = ' ' . $ret . ' ';
        $ret = preg_replace("#([\s>])(https?)://([^\s<>{}()]+[^\s.,<>{}()])#i", "$1<a href='$2://$3' rel='nofollow'>$2://$3</a>", $ret);
        $ret = preg_replace("#(\s)www\.([a-z0-9\-]+)\.([a-z0-9\-.\~]+)((?:/[^ <>{}()\n\r]*[^., <>{}()\n\r]?)?)#i", "$1<a href='http://www.$2.$3$4' rel='nofollow'>www.$2.$3$4</a>", $ret);
        $ret = preg_replace("#(\s)([a-z0-9\-_.]+)@([a-z0-9\-_.]+)\.([^,< \n\r]+)#i", "$1<a href=\"mailto:$2@$3.$4\">$2@$3.$4</a>", $ret);
        $ret = trim($ret);
        return $ret;
}

function make_clickable_new($ret) {
        $ret = ' ' . $ret;
        $ret = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "$1<a href='$2' rel='nofollow'>$2</a>", $ret);
        $ret = preg_replace("#(^|[\n ])((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "$1<a href='http://$2' rel='nofollow'>$2</a>", $ret);
        $ret = preg_replace("#(\s)([a-z0-9\-_.]+)@([^,< \n\r]+)#i", "$1<a href=\"mailto:$2@$3\">$2@$3</a>", $ret);
        $ret = substr($ret, 1);
        $ret = trim($ret);
        return $ret;
}

function make_clickable_mine($ret) {
        $ret = ' ' . $ret . ' ';
        $ret = preg_replace("#([\s\n>])(https?|ftp)://([^\s<>{}()]+[^\s.,<>{}()])#i", "$1<a href='$2://$3' rel='nofollow'>$2://$3</a>", $ret);
        $ret = preg_replace("#([\s\n>])(www|ftp)\.([a-z0-9\-]+)\.([a-z0-9\-.\~]+)((?:/[^ <>{}()\n\r]*[^., <>{}()\n\r]?)?)#i", "$1<a href='http://$2.$3.$4$5' rel='nofollow'>$2.$3.$4$5</a>", $ret);
        $ret = preg_replace("#([\s\n>])([a-z0-9\-_.]+)@([a-z0-9\-_.]+)\.([^,< \n\r]+)#i", "$1<a href=\"mailto:$2@$3.$4\">$2@$3.$4</a>", $ret);
        $ret = preg_replace("#(<a [^>]+?>)<a [^>]+?>([^>]+?)</a></a>#i", "$1$2</a>", $ret);
        $ret = trim($ret);
        return $ret;
}

?>

<?php echo make_clickable_old($sentence); ?>


<?php echo make_clickable_new($sentence); ?>


<?php echo make_clickable_mine($sentence); ?>