Check if function returns false?

[newbtophp]

How can I check if a function has returned false.. I know theirs the following way:

 

if (!checkdate($month, $day, $year)) {
//the function has returned false
}

 

But is their another way (beside using the ! operator) perhaps === FALSE (not sure if that'd work so asking)?

[premiso]

if (function($params) === false) // check if the return value is EXACTLY false, so the type is required to be boolean.

if (function($params) == false) // Just requires the data to be null, 0, '' or false. 

if (!function($params)) // Just requires the data to be null, 0, '' or false. 

[newbtophp]

cheers premiso!