[SOLVED] Remove end of string after specific word

[Nokki]

Hello,

 

I am pretty much new to php and I am trying to figure out the following:

 

I have a URL string like:

domain.com/index.jsp;jsessionid=824E485D748EB687F88497BA39685C81

 

I am looking for someone who could help me out with a function that would be like

 

function cleanurl($word,$toclean) {  

}

 

The idea would be that I can use it like:

 

$cleanurl = cleanurl($dirtyurl,";jsessionid");

 

So what the function would do is: Check the url for ;jsessionid and remove everything after, but including the selected word / mini string.

 

Here is an example:

 

$dirtyurl = "domain.com/index.jsp;jsessionid=824E485D748EB687F88497BA39685C81";

$cleanurl = cleanurl($dirtyurl,";jsessionid");

 

echo $cleanurl woudl return:

domain.com/index.jsp

 

Any help would be great

 

[Adam]

It's a lot simpler than you might think with the substr_replace() function. Try this:

 

function cleanurl($word, $toclean)
{
    $pos = strpos($word, $toclean);

    if ($pos !== false)
    {
        return substr_replace($word, '', $pos);
    }

    return $word;
}

[Nokki]

Thanks for that - it works fine so far.

 

I wonder if there is a different way as I just noticed that some urls break after removing the session ids if the urls are like

 

domain.com/index.php?PHPSESSID=12345&area=home

 

Is there maybe a way to just strip from the startpoint to either the next slash (/) or to the next "and" (&) so values after the removed session stay intact?

 

Again, thanks for your very quick post - It's nearly working as expected

[Adam]

You can do this easily with PEAR:

 

<?php

require_once 'Net/URL.php';

$dirtyurl = 'domain.com/index.php?PHPSESSID=12345&area=home';

$url = new Net_URL($dirtyurl);
unset($url->querystring['PHPSESSID']);

$cleanurl = $url->getURL();

?>

 

Although you may want to add "http://" to the start of your URLs to stop PEAR automatically adding the current domain you're on...

[thebadbad]

Or using regular expressions:

 

<?php
function cleanurl($url, $query_name) {
$pattern = '~(\?|&)' . preg_quote($query_name, '~') . '=[^&]*&?~';
$cleanurl = preg_replace($pattern, '$1', $url);
if (in_array(substr($cleanurl, -1), array('?', '&'))) {
	$cleanurl = substr($cleanurl, 0, -1);
}
return $cleanurl;
}
$url = 'http://domain.com/index.php?PHPSESSID=12345&area=home';
echo cleanurl($url, 'PHPSESSID');
//http://domain.com/index.php?area=home
?>

It should return a perfectly valid URL, removing ?s and &s when necessary. If your URLs use a semi-colon instead of a question mark to denote the start of the query string, you can swap the first and last question mark within the function with semi-colons.

[Nokki]

Thank you for all your answers - I used a mix of all the above functions

 

Again, thanks a lot