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PHP filter_has_var() Function

< PHP Filter Reference

Example

Check if the input variable "email" is sent to the PHP page, through the "get" method:

<?php
if (!filter_has_var(INPUT_GET, "email")) {
echo("Email not found");
} else {
echo("Email found");
}
?>

Definition and Usage

The filter_has_var() function checks if a variable of a specified input type exist.

Syntax

filter_has_var(type, variable)

Parameter	Description
type	Required. The input type to check for. Can be one of the following: INPUT_GET INPUT_POST INPUT_COOKIE INPUT_SERVER INPUT_ENV
variable	Required. The variable name to check

Technical Details

Return Value:	Returns TRUE on success or FALSE on failure
PHP Version:	5.2.0+

< Complete PHP Filter Reference