hyperlinking urls

[mtaylor]

Hi,

 

I have a string containing html markup. I'm trying to make links in it clickable (for when it is displayed in the browser). This is what I have so far:

 

 

  $text = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_\+.~#?&//=]+)',
    '<a target="_blank" href="\\1">\\1</a>', $text);

  $text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_\+.~#?&//=]+)',
    '\\1<a target="_blank" href="http://\\2">\\2</a>', $text);

  $text = eregi_replace('([_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.)+[a-z]{2,3})',
    '<a href="mailto:\\1">\\1</a>', $text);

 

The problem is that this obviously matches urls in (for example) image tags. I guess I only want to be matching urls that are not inside < > tags. My first though was something like >[^<]* at the beginning - that should match a closing angle bracket followed by zero or more characters which aren't opening angle brackets, right? Would that work?

 

[effigy]

<pre>
<?php
$data = <<<DATA
<img src="http://www.somewhere.com/image.jpg">
Visit www.phpfreaks.com!
<a href="http://www.google.com">http://www.google.com</a>
See http://www.regular-expressions.info
DATA;
$pieces = preg_split('/(<[^>]+>)/', $data, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
$num_pieces = count($pieces);
for ($i = 0; $i < $num_pieces; $i++) {
	### Skip tags or content of <a>.
	if (substr($pieces[$i], 0, 1) == '<'
	||  array_key_exists($i-1, $pieces)
	&&  substr($pieces[$i-1], 0, 3) == '<a '
	){
		continue;
	}
	$pieces[$i] = preg_replace('%
		(
			(?:
				(??:https?|ftp)://)
				|
				www\.
			)
			\S+
			(?<!\p{P})
		)
	%x', '<a href="$1">$1</a>', $pieces[$i]);
}
echo htmlspecialchars(join('', $pieces));
?>
</pre>