No more undefined index using PHP’s $_GET and $_POST

It’s very annoying having to check whether $_GET['somevalue'] is set before checking its value – but if you don’t, your code is going to throw a a lot of Notice: Undefined index warnings and that’s never good.

I’ve written a quick class to make every PHP developer’s life a bit easier. It’s based on CodeIgniter‘s $this->input class. You can use it as follows and never have to worry about whether the index exists or not… It will just get set to NULL if it doesn’t.

[code lang=”php”]
class Input {
function get($name) {
return isset($_GET[$name]) ? $_GET[$name] : null;

function post($name) {
return isset($_POST[$name]) ? $_POST[$name] : null;

function get_post($name) {
return $this->get($name) ? $this->get($name) : $this->post($name);
$input = new Input;

$page = $input->get(‘page’); // // look in $_GET
$page = $input->post(‘page’); // // look in $_POST
$page = $input->get_post(‘page’); // look in both $_GET and $_POST


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