PHP – Make URLs clickable (And short down)

<?php

$text = ‘Some text here with an URL here http://www.superlongurl.com/superlongfoldername/filename.ext and some more text here blah blah blah.’;

/*
Makes the URLs clickable and shorts them down to 35 chars max since it’s the default value and no other one was specified.
*/
echo parse_urls($text);

/*
Outputs: Some text here with an URL here http://www.superlongurl.c…ilename.ext and some more text here blah blah blah.
*/
echo parse_urls($text, 40);

/*
Makes the URLs clickable, but doesn’t short them down.
*/
echo parse_urls($text, false);

/*
Makes the URLs clickable, and sets the target attribute to _blank, so they will open in a new window. This can be left in blank. The default target is _self.
*/
echo parse_urls($text, false, ‘_blank’);

function parse_urls($text, $maxurl_len = 35, $target = ‘_self’)
{
if (preg_match_all(‘/((ht|f)tps?:\/\/([\w\.]+\.)?[\w-]+(\.[a-zA-Z]{2,4})?[^\s\r\n\(\)“\’<>\,\!]+)/si’, $text, $urls))
{
$offset1 = ceil(0.65 * $maxurl_len) – 2;
$offset2 = ceil(0.30 * $maxurl_len) – 1;

foreach (array_unique($urls[1]) AS $url)
{
if ($maxurl_len AND strlen($url) > $maxurl_len)
{
$urltext = substr($url, 0, $offset1) . ‘…’ . substr($url, -$offset2);
}
else
{
$urltext = $url;
}

$text = str_replace($url, ‘<a href=”‘. $url .‘” target=”‘. $target .‘” title=”‘. $url .‘”>’. $urltext .‘</a>’, $text);
}
}

return $text;
}
?>