filter_has_var

(PHP 5 >= 5.2.0)

filter_has_var — Checks if variable of specified type exists

Description

bool filter_has_var ( int $type , string $variable_name )

Parameters

type: One of INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, or INPUT_ENV.
variable_name: Name of a variable to check.

Return Values

Returns TRUE on success or FALSE on failure.

add a note User Contributed Notes filter_has_var

Anonymous 21-May-2009 09:28


To note: filter_has_var() is a bit faster than isset()

drm at melp dot nl 16-Jan-2009 09:54


Please note that the function does not check the live array, it actually checks the content received by php:



<?php

$_GET['test'] = 1;

echo filter_has_var(INPUT_GET, 'test') ? 'Yes' : 'No';

?>



would say "No", unless the parameter was actually in the querystring.



Also, if the input var is empty, it will say Yes.

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