Question

Possible Duplicate:
Change single variable value in querystring

I’m retrieving the current URL:

http://example.com/?s=original&fq=category

and now I want to insert an additional argument for the s=

s=original+additional&fq=category

If anyone knows this off the top of their head it would be greatly appreciated!

EDIT:

This is in a PHP WordPress environment. I’m tempted to stick with PHP Regex because I’m not sure how to use jQuery/js

Answer 1

A solution that does not explicitly require regular expressions:

$old   = 'http://example.com/?s=original&fq=category';
$parts = parse_url($old);

parse_str($parts['query'], $query);
$query['s'] .= ' additional';

$new = sprintf(
  '%s://%s%s?%s'
    , $parts['scheme']
    , $parts['host']
    , $parts['path']
    , http_build_query($query)
);

echo 'Old: ', $old, PHP_EOL, 'New: ', $new, PHP_EOL;

The above code outputs:

Old: http://example.com/?s=original&fq=category
New: http://example.com/?s=original+additional&fq=category