is the $_GET exists?

[jrahma]

Hi,

in PHP, how can I check if the QueryString $_GER

1. Exists in the url.

2. Exists with value

3. Exists without value

Thanks,
Jassim

[dalecosp]

jrahma;11034851 wrote:

Hi,

in PHP, how can I check if the QueryString $_GER

1. Exists in the url.

2. Exists with value

3. Exists without value

Thanks,
Jassim

It shouldn't be too difficult.

1. if ($_GET)

   is a simple test;

   if strlen($_SERVER['QUERY_STRING'])

   might be a better test.

2. if (!empty($_GET)

3. if (empty($_GET)

[NogDog]

I'm guessing you probably want to verify specific elements of $_GET, not that the super-global array itself exists?

E.g.:

if(isset($_GET['foo']) {}

// or

if(!empty($_GET['foo']) {}

// or

if(isset($_GET['foo']) and $_GET['foo'] !== '') {}

[bradgrafelman]

You'll also want to precisely define what it means for something to exist "with" or "without" value. For example, you might think that the string '0' is a perfectly valid (non-empty) value, however [man]empty/man does not:

$_GET[ 'foo' ] = '0';
$_GET[ 'bar' ] = '1';
var_dump( empty( $_GET[ 'foo' ] ) ); // bool(true)
var_dump( empty( $_GET[ 'bar' ] ) ); // bool(false)