Finds whether a variable is null
Syntax
is_null(mixed $value): bool
Parameters
valueThe variable being evaluated.
Return
Returns true if value is null, false otherwise.
Examples
1
<? $value = null; $return = is_null($value); var_export($return); ?>
true
2
<? // $value does not exist $return = is_null($value); var_export($return); ?>
true
