filter_has_var

(PHP 5 >= 5.2.0, PECL filter:0.11.0)

filter_has_var — Checks if variable of specified type exists

bool filter_has_var ( int $type , string $variable_name )

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

如果成功则返回 TRUE，失败则返回 FALSE。

add a note User Contributed Notes
filter_has_var

julien dot pauli at doctorrock dot eu
08-Jan-2007 04:43


<?php

filter_has_var(INPUT_POST, 'submit')

?>

is same as 

<?php

isset($_POST['submit'])

?>

Last updated: Sun, 25 Nov 2007