is_null

(PHP 4 >= 4.0.4, PHP 5)

is_null — Finds whether a variable is NULL

Description

bool is_null ( mixed $var )

Finds whether the given variable is NULL.

Parameters

var

The variable being evaluated.

Return Values

Returns TRUE if var is null, FALSE otherwise.

See Also

• The NULL type
• isset()
• is_bool()
• is_numeric()
• is_float()
• is_int()
• is_string()
• is_object()
• is_array()