PHP : ReflectionParameter, isOptional vs isDefaultValueAvailable

Question

What is the difference between two. both of these are working exactly in a same way.

public static function getArgsArray($reflectionMethod,$argArray){
    $a         


        

Answer 1

Good question. Consider this example

function foo($foo = 'foo', $bar) {}

For the $foo parameter, isDefaultValueAvailable() would understandably return true however isOptional() would return false as the next parameter ($bar) has no default value and is therefore not optional. To support the non-optional $bar parameter, $foo must itself be non-optional.

Hope this makes sense ;)

I've noted that behaviour differs across PHP versions. 5.5 returns the above whereas 5.4 says parameter 1 is both not optional and has no default value.

• PHP 5.4 - https://eval.in/154641
• PHP 5.5 - https://eval.in/154642