Extracting URLs from a text string

bonolo

I've noticed a number of posts and tips which discuss extracting URLs from Web pages. I need to pull URLs out of a body of text.

For instance, if http://www.phpbuilder.com/ appears in a paragraph, I'd like to find it, mark it up with <a href> tags and return it to another string variable.

Anybody know how to do this easily?

twopeak

there's probably a litteral example of this in the PHP handbook!

Code_guy

I answered somthing like this before:
http://www.phpbuilder.com/board/showthread.php?s=&threadid=10222687

I think you can figure out how to add the anchor tags.

MiH

this works with vbTag URL.

"|\[ url=(.*)\](.*)\[ /url\]|i","|\[ url\](.*)\[/ url\]|i",

and this replace

"<a href=\"\\1\" class=\"uLink\" target=\"_blank\">\\2</a>","<a href=\"\\1\" class=\"uLink\" target=\"_blank\">\\1</a>"

you can use this regular expression:

function checkurl($txt){
	$search = array(
		"|(https?)([^\s]+)|is",
		"|[^([url]http://[/url])](w{3}[^\s]+)|is"		
		);
	$replace = array(
		" <a href=\"\\1\\2\">\\1\\2</a>",
		" <a href=\"http://\\1\">\\1</a>"
		);
	$txt = preg_replace($search,$replace,$txt);
	return $txt;
}

try it 😉

Code_guy

hmm..
$txt = "Wowwww, tclhttpd rulez! I like WWW.PHPBUILDER.COM!";
echo checkurl($txt);
😉

Brusca

The above script is great. I have implemented it and it works well. Although I need to return the <a href> with a target="blank".

I understand the expressions a little but just can't get this into the <a href> returned.

Anybody??

Cheers
Bruce

twopeak

change
" <a href=\"\1\2\">\1\2</a>",
" <a href=\"http://\1\">\1</a>"

into

" <a href=\"\1\2\" target=\"_blank\">\1\2</a>",
" <a href=\"http://\1\" target=\"_blank\">\1</a>"

My problem is this:
how do I implement this if I allready have ubb tags:
every image will become a link!
so it should only work if char before the match is a "" or a space...