IS_NULL(3) 1 IS_NULL(3)
is_null - Finds whether a variable is NULL
SYNOPSIS
bool is_null (mixed $var)
DESCRIPTION
Finds whether the given variable is NULL.
PARAMETERS
o $var
- The variable being evaluated.
RETURN VALUES
Returns TRUE if $var is null, FALSE otherwise.
EXAMPLES
Example #1
is_null(3) example
<?php
error_reporting(E_ALL);
$foo = NULL;
var_dump(is_null($inexistent), is_null($foo));
?>
Notice: Undefined variable: inexistent in ...
bool(true)
bool(true)
SEE ALSO
The NULL type, isset(3), is_bool(3), is_numeric(3), is_float(3), is_int(3), is_string(3), is_object(3), is_array(3).
PHP Documentation Group IS_NULL(3)
