Re: [PHP] Extract links from strings

[Philip Thompson]

On Sep 21, 2009, at 6:20 PM, Jim Lucas wrote:

Jim Lucas wrote:

Jônatas Zechim wrote:

Hi there, i've the following strings:

$string1 = 'Lorem ipsum dolor http://site.com sit amet';
$string2 = 'Lorem ipsum dolor http://www.site.com/ sit amet';
$string3 = 'Lorem ipsum dolor http://www.site.net sit amet';

How can I extract the URL from these strings?
They can be [http:// + url] or [www. + url].

Zechim

Something like this should work for you.

<plaintext><?php

$urls[] = 'Lorem ipsum dolor http://site.com sit amet';
$urls[] = 'Lorem ipsum dolor https://www.site.com/ sit amet';
$urls[] = 'Lorem ipsum dolor www.site1.net sit amet';
$urls[] = 'Lorem ipsum dolor www site2.net sit amet';

foreach ( $urls AS $url ) {
        if ( preg_match('%((https?://|www\.)[^\s]+)%', $url, $m) ) {
                print_r($m);
        }
}

?>

Actually, try this.  It seems to work a little better.

<plaintext><?php

$urls[] = 'Lorem ipsum dolor http://site.com sit amet';

$urls[] = 'Lorem ipsum dolor https://www.site.com/ or http://www.site2.com/' ;

$urls[] = 'Lorem ipsum dolor www.site1.net sit amet';
$urls[] = 'Lorem ipsum dolor www site2.net sit amet';

foreach ( $urls AS $url ) {
        if ( preg_match_all(    '%(https?://[^\s]+|www\.[^\s]+)%',
                                $url,
                                $m,
                                (PREG_SET_ORDER ^ PREG_OFFSET_CAPTURE)
        ) ) {
                print_r($m);
        }
}

?>

What if the sub domain was not 'www'?

http://no-www.org/

Cheers,
~Philip


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