Regular Expressions question.

JdS · #1 03-Nov-2002, 15:26

For an upcoming article on this site, I was testing out this regex that I came up with to extract urls off a text/string. see script below:

PHP Code:


<?php
$text = 'Add some sample text here with multiple URLs - vB parses them as urls if I type them here.';

extract_urls($text);

function extract_urls( $string )
{
    preg_match_all( '/((http|https|ftp):\/\/|www)([a-z0-9\-\._]+)\/?[a-z0-9_\.\-\?\+\/~=&;,]*/si', $string, $match );
    echo '<p>There are '.sizeof($match[0])." URLs in our text.</p>\n";
    echo "<ol>\n";
    for( $i=0; $i<sizeof($match[0]); $i++ )
    {
        echo '<li>URL is '.$match[0][$i]."</li>\n";
    }
    echo "</ol>\n";
}
?>

crappy vB seems to remove the backslashes in the regex pattern so here it is in code...

Code:

preg_match_all( '/((http|https|ftp):\/\/|www)([a-z0-9\-\._]+)\/?[a-z0-9_\.\-\?\+\/~=&;,]*/si', $string, $match );

the code works quite well except for the fact that it includes the last dot, just after the urls in any test string above. How to get a URL without the punctuation mark at the end of a URL?

conkermaniac · #2 04-Nov-2002, 02:34

Hi,

I just tested the script out on my computer and I got a result that looked like this:

Quote:

There are 2 URLs in our text.

URL is http://www.aimoo.com/
URL is http://www.freewebspace.net/

Anything wrong with that? I don't see any period.

JdS · #3 04-Nov-2002, 03:43

but what if you tried something like this: (remove the spaces I added in the urls before testing)

PHP Code:


$text = 'Site 1 is w w w . d e s i l v a . b i z, and site 2 is h t t p : 
/ / g i d h e l p . c o m. Also, there are other sites, like w w w . e x a m p l e . c o m.';

JdS · #4 04-Nov-2002, 14:04

after much caffeine and chewing on a used nicotine pack... i finally figured it out last night : PCRE Pattern - Extracting URLs

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Rate This Thread
Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Question about loading php into tables or css	pcxgamer	Web Design Forum	6	17-Sep-2005 21:08
a C input question..	tmike	C Programming Language	2	19-Sep-2003 02:39
a C input question	tmike	C Programming Language	1	16-Sep-2003 02:31
a noobish compiler question	Charunks	CPP / C++ Forum	5	03-Sep-2003 02:18
preg_replace + regular expression	EasyExpat	MySQL / PHP Forum	4	10-Jul-2003 04:36