is_null
PHP function
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(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
Finds whether a variable is null
Description
is_null(mixed $value): bool
Finds whether the given variable is null.
Parameters
valueThe variable being evaluated.
Return Values
Returns true if value is null, false otherwise.
Examples
is_null() example
php
<?php
error_reporting(E_ALL);
$foo = NULL;
var_dump(is_null($inexistent), is_null($foo));
?>