如何分隔值$ _GET

I have a problem with getting one value. I'm calling my script with:

xxx.php?action=activate&timestamp=1415550311&gate=smscz&pricing=czchest1
&sum=29.00&currency=czk&days=0&identifiers%5Bglobal%5D%5Btext%5D=NomisCZ&key=czchest1`

$action = $_GET['action'];
$pricing = $_GET['pricing'];

etc.

but I have problem with getting value &identifiers. I need only value NomisCZ from this &identifiers%5Bglobal%5D%5Btext%5D=NomisCZ.

What you have in your request, url decoded

identifiers[global][text]=NomisCZ&key=czchest1

To access NomisCZ use this

$_GET['identifiers']['global']['text'];