Description:
------------
Reflection for procedural style function "mysqli_fetch_all" only returns the first (required) parameter "result", but the second optional parameter "resulttype" is missing. Also the reflection for "mysqli_result::fetch_all" does not return any parameter, while one "resulttype" is optional. (see https://secure.php.net/mysqli_fetch_all)

There was no point in writing more complex tests to demonstrate the problem.

This caused problems in phpstan https://github.com/phpstan/phpstan/issues/549

Test script:
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$reflection = new \ReflectionFunction('mysqli_fetch_all');
$parameters = $reflection->getParameters();
var_dump($reflection->getNumberOfParameters());
var_dump($reflection->getNumberOfRequiredParameters());

$reflection = new \ReflectionMethod('mysqli_result', 'fetch_all');
$parameters = $reflection->getParameters();
var_dump($reflection->getNumberOfParameters());
var_dump($reflection->getNumberOfRequiredParameters());


Expected result:
----------------
int(1)
int(1)
int(0)
int(0)

Actual result:
--------------
int(2)
int(1)
int(1)
int(0)