PHP - how to remove data using PHP

How can I remove ?cat= from the example 1 so it can lo开发者_开发问答ok like example 2 using PHP.

Example 1

?cat=some-cat

Example 2

some-cat

Easy, use str_replace:

$cat = '?cat=some-cat';
$cat = str_replace('?cat=', '', $cat);

EDIT:

If you are pulling this query string through something like $_SERVER['QUERY_STRING'], then I'd opt for you to use $_GET, which is an associative array of the GET variables passed to your script, so if your query string looked like this:

?cat=some-cat&dog=some-dog

The $_GET array would look like this:

(
   'cat' => 'some-cat',
   'dog' => 'some-dog'
)


$cat = $_GET['cat']; //some-cat
$dog = $_GET['dog']; //some-dog

Another edit:

Say you had an associative array of query vars you wish to append onto a URL string, you'd do something like this:

$query_vars = array();
$query_vars['cat'] = 'some-cat';
$query_vars['dog'] = 'some-dog';

foreach($query_vars as $key => $value) {
   $query_vars[] = $key . '=' . $value;
   unset($query_vars[$key]);
}

$query_string = '?' . implode('&', $query_vars); //?cat=some-cat&dog=some-dog

Yes, you can, very easily:

$cat = '?cat=some-cat';
$cat = substr($cat, 5); // remove the first 5 characters of $cat

This may not be the best way to do this. That will depend on what you are attempting to achieve...