[PHP-BUG] Bug #74351 [NEW]: Wrong reflection on variadic array functions

From:             fabien dot villepinte at gmail dot com
Operating system: 
PHP version:      Irrelevant
Package:          Reflection related
Bug Type:         Bug
Bug description:Wrong reflection on variadic array functions

Description:
------------
The following functions are variadic but ReflectionFunction::isVariadic
and ReflectionParameter::isVariadic return false :
array_diff_uassoc
array_diff_ukey
array_intersect_uassoc
array_intersect_ukey
array_udiff
array_udiff_assoc
array_udiff_uassoc
array_uintersect
array_uintersect_assoc
array_uintersect_uassoc

The test script looks more complicated than necessary because I wanted
to highlight the differencies with HHVM (see : https://3v4l.org/clKBH ).

Test script:
---------------
<?php

$functions = [
    'array_diff_uassoc',
    'array_diff_ukey',
    'array_intersect_uassoc',
    'array_intersect_ukey',
    'array_udiff',
    'array_udiff_assoc',
    'array_udiff_uassoc',
    'array_uintersect',
    'array_uintersect_assoc',
    'array_uintersect_uassoc',
];

foreach ($functions as $func) {
    $reflFunc = new ReflectionFunction($func);
    $nbParams = $reflFunc->getNumberOfParameters();
    $nbRequiredParams = $reflFunc->getNumberOfRequiredParameters();
    printf("$func ($nbParams params, $nbRequiredParams required) %s
VARIADIC", $reflFunc->isVariadic() ? "IS" : "IS NOT");
    foreach ($reflFunc->getParameters() as $i => $param) {
        if ($param->isVariadic()) {
            printf(" - PARAM #%d%s IS VARIADIC", $i + 1,
$param->isOptional() ? " (Opt.)" : "");
        }
    }
    echo PHP_EOL;
}

Expected result:
----------------
array_diff_uassoc (3 params, 3 required) IS VARIADIC - PARAM #2 IS
VARIADIC
array_diff_ukey (3 params, 3 required) IS VARIADIC - PARAM #2 IS
VARIADIC
array_intersect_uassoc (3 params, 3 required) IS VARIADIC - PARAM #2 IS
VARIADIC
array_intersect_ukey (3 params, 3 required) IS VARIADIC - PARAM #2 IS
VARIADIC
array_udiff (3 params, 3 required) IS VARIADIC - PARAM #2 IS VARIADIC
array_udiff_assoc (3 params, 3 required) IS VARIADIC - PARAM #2 IS
VARIADIC
array_udiff_uassoc (4 params, 4 required) IS VARIADIC - PARAM #2 IS
VARIADIC
array_uintersect (3 params, 3 required) IS VARIADIC - PARAM #2 IS
VARIADIC
array_uintersect_assoc (3 params, 3 required) IS VARIADIC - PARAM #2 IS
VARIADIC
array_uintersect_uassoc (4 params, 4 required) IS VARIADIC - PARAM #2 IS
VARIADIC

Actual result:
--------------
array_diff_uassoc (3 params, 3 required) IS NOT VARIADIC
array_diff_ukey (3 params, 3 required) IS NOT VARIADIC
array_intersect_uassoc (3 params, 3 required) IS NOT VARIADIC
array_intersect_ukey (3 params, 3 required) IS NOT VARIADIC
array_udiff (3 params, 3 required) IS NOT VARIADIC
array_udiff_assoc (3 params, 3 required) IS NOT VARIADIC
array_udiff_uassoc (4 params, 4 required) IS NOT VARIADIC
array_uintersect (3 params, 3 required) IS NOT VARIADIC
array_uintersect_assoc (3 params, 3 required) IS NOT VARIADIC
array_uintersect_uassoc (4 params, 4 required) IS NOT VARIADIC

-- 
Edit bug report at https://bugs.php.net/bug.php?id=74351&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=74351&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=74351&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=74351&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=74351&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=74351&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=74351&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=74351&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=74351&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=74351&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=74351&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=74351&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=74351&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=74351&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74351&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=74351&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=74351&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=74351&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=74351&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=74351&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=74351&r=mysqlcfg