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(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.

Related Function(s)

is_bool()

is_numeric()

is_float()

is_int()

is_string()

is_object()

is_array()