[RESOLVED] Help with AUTO LINK script

[intenz]

I'm trying to make a script which changes all urls in $string to LINKS.

What I have is...

<?php
$string = 'Some text here

Google gesture search
http://www.youtube.com/watch?v=txX5rXtY7CY

Google Goggles
http://www.youtube.com/watch?v=Hhgfz0zPmH4

Google Skymap
http://www.youtube.com/watch?v=p6znyx0gjb4';

$regex = '((http|https|ftp)://([-a-zA-Z0-9?éÉýÝúÚíÍóÓðÐáÁæÆþÞ@\#-/&\\$%_=:\;\.~])*)';
$prexp = '#' . $regex . '#i';
$matches = preg_match_all( $prexp, $string, $output );
for( $i = 0; $i < $matches; $i++ )
{
	if( strlen( $output[1][$i] ) > 70 )
		$output[2][$i] = substr_replace( $output[1][$i], '...', 35, -35 );
	else
		$output[2][$i] = $output[1][$i];

$rpl = ereg_replace( $regex,'<a href="\1" target="_blank">' . $output[2][$i] . '</a>', $output[1][$i] );

$string = preg_replace( $prexp, $rpl, $string, 1);
}

echo nl2br( $string );		
?>

The output is:

Some text here

Google gesture search
http://www.youtube.com/watch?v=p6znyx0gjb4" target="_blank">http://www.youtube.com/watch?v=Hhgfz0zPmH4" target="_blank">http://www.youtube.com/watch?v=txX5rXtY7CY

Google Goggles
http://www.youtube.com/watch?v=Hhgfz0zPmH4

Google Skymap
http://www.youtube.com/watch?v=p6znyx0gjb4

What is wrong?

[Weedpacket]

function linkify_url_callback($match)
{
    $url = $match[0];
    if(strlen($url) > 70)
    {
        // This is why a callback is being used instead of just
        // a replacement string
        $display_url = substr_replace($url, '...', 32, -35);
    }
    else
    {
        $display_url = $url;
    }
    return "<a href=\"$url\">$display_url</a>";
}


$regexp = '#(https?|ftp)://....thatstuff...#i';
$string = preg_replace_callback($regexp, $string, 'linkify_url_callback');