Simplest way to convert all html links in a string using PHP

Question

I am trying to convert a block of text that contains html text - i'd like to find all http links and convert them for link tracking purposes.

So eg anything like this in a string would be converted to the latter

<a href="http://www.google.com">Some Link</a>

<a href="http://www.mysite.com/tracking.php?url=www.google.com">Some Link</a>

Can anyone how to do this taking into account the original string will consists of all sorts of html, images etc..

Sorry i misunderstand question

safarov
– safarov

2012-04-02 11:00:28 +00:00
Commented Apr 2, 2012 at 11:00 — safarov
– safarov, Commented Apr 2, 2012 at 11:00

Dr.Kameleon · Accepted Answer · 2012-04-02 11:25:47Z

2

Use this regex : (UPDATED)

<?php

$str = '<h1>Page Title</h1><a href="http://www.google.com/">Google</a>';
$text = preg_replace("/href=\"http\:\/\/([a-zA-Z0-9\-]+\.[a-zA-Z0-9]+\.[a-zA-Z]{2,3}(\/*)?)/","href=\"http://www.mysite.com/tracking.php?url=$1\"",$str);

echo $text;

?>

Outputs :

<h1>Page Title</h1><a href="http://www.mysite.com/tracking.php?url=www.google.com/"">Google</a>

edited Apr 2, 2012 at 11:25

answered Apr 2, 2012 at 11:03

Dr.Kameleon

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4 Comments

Zabs Over a year ago

I get the following error: Warning: preg_replace() [function.preg-replace]: Delimiter must not be alphanumeric or backslash in...

Zabs Over a year ago

My code below.. (cant seem to get the formatting correct??) $str = '<h1>Page Title</h1><a href="google.com">Google</a>'; $text = preg_replace('href=\"http\://([a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?)\"', 'href=\"YOUR_TRACKING_URL=$1\"', $str); echo $text;

Zabs Over a year ago

just a quick one.. How would I amend the preg_replace to only replace href's that do not have the 'clients' in the href? (but keeping the existing rule as well)

Dr.Kameleon Over a year ago

@Gaz Could you give me an example of a URL containing 'clients'? (I mean you're obviously not interested in excluding clients.com, but something along the lines of http://www.yourdomain.com/clients/some_page.php, right? that's what I want so as to make it more specific) :-)

Zabs · Accepted Answer · 2012-04-02 11:15:18Z

0

$str = '<h1>Page Title</h1><a href="http://www.google.com">Google</a>';
$text = preg_replace('href=\"http\://([a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?)\"', 'href=\"YOUR_TRACKING_URL=$1\"', $str);
echo $text;

Warning: preg_replace() [function.preg-replace]: Delimiter must not be alphanumeric or backslash in /home/.... (sorry for the duplication)

answered Apr 2, 2012 at 11:15

Zabs

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