is_null

Finds whether a variable is null

bool **is_null** mixed $value

Finds whether the given variable is null.

valueThe variable being evaluated.

Returns true if is , false otherwise. value``null

Voorbeeld: example

<?php

error_reporting(E_ALL);

$foo = NULL;
var_dump(is_null($inexistent), is_null($foo));

?>

nullisset``is_bool``is_numeric``is_float``is_int``is_string``is_object``is_array

Documentatie