Description:
------------
If I try to use ReflectionMethod::InvokeArgs after using function array_unshift inside of user function, this return me this:

Warning: Parameter 2 to mysqli_stmt::bind_param() expected to be a reference, value given in /www/transaction_test.php on line 132

Fatal error: Uncaught exception 'ReflectionException' with message 'Invocation of method mysqli_stmt::bind_param() failed' in /www/transaction_test.php:132 Stack trace: #0 /www/transaction_test.php(132): ReflectionMethod->invokeArgs(Object(mysqli_stmt), Array) #1 /www/transaction_test.php(146): test_case_function('INSERT INTO `te...', Array, 'ss') #2 {main} thrown in /www/transaction_test.php on line 132


If I try run it out of user function. Everything is OK. 


Test script:
---------------
function test_case_function ($sql,$variables,$vars) {
  $mysqli = new mysqli(db_server, db_user_name, db_user_passwd, db_name);
  $mysqli->query("SET NAMES 'utf8'") or die ('Could not set Charset');
  $mysqli->autocommit(FALSE);



    array_unshift($variables,$vars);




  if ($stm=$mysqli->prepare($sql)) {
    $method= new ReflectionMethod('mysqli_stmt','bind_param');
    $method->invokeArgs($stm,$variables);
    }

  $stm->execute();
  printf("%d Row inserted\n", $stm->affected_rows);
  $mysqli->commit();
  $stm->close();
  $mysqli->close();
}

$sql = "INSERT INTO `test_table` (`time`,`one`,`two`) VALUES (NOW(),?,?);";
$vars = 'ss';
$variables = array ("one62","two62");

test_case_function($sql,$variables,$vars);

Expected result:
----------------
Script print "1 Row inserted "

Actual result:
--------------
Warning: Parameter 2 to mysqli_stmt::bind_param() expected to be a reference, value given in /www/transaction_test.php on line 132

Fatal error: Uncaught exception 'ReflectionException' with message 'Invocation of method mysqli_stmt::bind_param() failed' in /www/transaction_test.php:132 Stack trace: #0 /www/transaction_test.php(132): ReflectionMethod->invokeArgs(Object(mysqli_stmt), Array) #1 /www/transaction_test.php(146): test_case_function('INSERT INTO `te...', Array, 'ss') #2 {main} thrown in /www/transaction_test.php on line 132