PHP Removing part of a dynamic string

[JonD]

I have strings like this (URL):

?p1=users&p2=management&orderby=dateregistered&order=DESC&p=2

or

?p1=users&p2=management&p=2&orderby=dateregistered&order=DESC

How would I elimate certain variables from this? such as p?

I need to remove &p=2 (the number can be any number).

How can this be done?

 

[JonD]

Well this is the kind of thing i need to do

$string = $_SESSION['QUERY_STRING'];

$string = removeP($string);

echo '<a href="'.$string.'">Link</a>'

 

[JonD]

could you explain that thats doing please?

jd

 

[JonD]

$string = preg_replace('/' . preg_quote('&p=', '/') . '\d+/', '', $string);

untested.

That works fine at the moment, cant see any bugs. Im not sure what that preg_quote is doing tho.

 

[JonD]

Not sure. Looks like it would only replace '&p=' with ''.

What does the \d+/ do? All those slashes are confusing.

Yeh whats is that d+?

What what I have to change if instead of numbers after the p there was letters?

 

[JonD]

doesnt the d remove numbers and replacing the d with a will remove a string?