is_null
Finds whether a variable is NULL
Syntax
is_null ( mixed $var ) : bool
Parameters
var
The variable being evaluated.
Return
Returns TRUE if var is null, FALSE otherwise.
Examples
1
<? $var = null; $return = is_null($var); echo $return; ?>
1
2
<? // $var does not exist $return = is_null($var); echo $return; ?>
1
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