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<?php function call_user_func_fixed() { // Not much point in writing all that logic out twice, just require that both fixer functions are present $args = func_get_args(); $callable = array_shift($args); return call_user_func_array_fixed($callable, $args); } function call_user_func_array_fixed($callable, $args) { $isStaticMethod = false; // Normalize the $callable and see if it looks like a static method if (is_object($callable) && $callable instanceof Closure) { $func = $callable; } else if (is_string($callable)) { $expr = '/^([a-z_\x7f-\xff][\w\x7f-\xff]*)::([a-z_\x7f-\xff][\w\x7f-\xff]*)$/i'; if (preg_match($expr, $callable, $matches)) { $func = array($matches[1], $matches[2]); $isStaticMethod = true; } else { $func = $callable; } } else if (is_array($callable) && isset($callable[0], $callable[1]) && count($callable) === 2) { if (is_object($callable[0])) { $func = $callable; } else if (is_string($callable[0])) { $func = $callable; $isStaticMethod = true; } } // If it's not a valid callable give up here if (!isset($callable) || (!$isStaticMethod && !is_callable($callable))) { trigger_error('call_user_func() expects parameter 1 to be a valid callback', E_USER_WARNING); return null; } // If it's not a static method use the regular mechanism if (!$isStaticMethod) { return call_user_func_array($func, $args); } // Get a reference to the target static method if possible try { if ($func[0] === 'self') { $backtrace = debug_backtrace(); // passing args here is fraught with complications for backwards compat :-( $key = $backtrace[1]['function'] === 'call_user_func_fixed' ? 2 : 1; if (empty($backtrace[$key]['class'])) { throw new Exception('Use of self in an invalid context'); } $class = new ReflectionClass($backtrace[$key]['class']); // I know this looks odd, but it's basically what self:: does $method = $class->getMethod($func[1])->getDeclaringClass()->getMethod($func[1]); if ($method->isPrivate() && (empty($backtrace[$key - 1]['class']) || $method->getDeclaringClass() !== $backtrace[$key - 1]['class'])) { var_dump($method->getDeclaringClass(), $backtrace); throw new Exception('Attempting to call private method in an invalid context'); } else if (method_exists($method, 'setAccessible')) { $method->setAccessible(true); // so we can call protected and allowable private methods } } else if ($func[0] === 'static' && function_exists('get_called_class')) { $class = new ReflectionClass(get_called_class()); $method = $class->getMethod($func[1]); } else { $class = new ReflectionClass($func[0]); $method = $class->getMethod($func[1]); } // Invoke the method with the passed arguments and return the result return $method->invokeArgs(null, $args); } catch (Exception $e) { trigger_error('call_user_func*() expects parameter 1 to be a valid callback: ' . $e->getMessage(), E_USER_WARNING); return null; } // Invoke the method with the passed arguments and return the result return $method->invokeArgs(null, $args); } class Car { public function run() { return call_user_func_fixed('self::getName'); // should call toyota } private static function getName() { return 'Car'; } } class Toyota extends Car { public static function getName() { return 'Toyota'; } } $car = new Car(); echo $car->run(); //Car instead of Toyota $toyota = new Toyota(); echo $toyota->run(); //Car instead of Toyota
Output for 7.0.0 - 7.1.0
object(ReflectionClass)#4 (1) { ["name"]=> string(3) "Car" } array(3) { [0]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(9) ["function"]=> string(26) "call_user_func_array_fixed" ["args"]=> array(2) { [0]=> string(13) "self::getName" [1]=> array(0) { } } } [1]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(88) ["function"]=> string(20) "call_user_func_fixed" ["args"]=> array(1) { [0]=> string(13) "self::getName" } } [2]=> array(7) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(102) ["function"]=> string(3) "run" ["class"]=> string(3) "Car" ["object"]=> object(Car)#1 (0) { } ["type"]=> string(2) "->" ["args"]=> array(0) { } } } Warning: call_user_func*() expects parameter 1 to be a valid callback: Attempting to call private method in an invalid context in /in/DlfI1 on line 78 object(ReflectionClass)#5 (1) { ["name"]=> string(3) "Car" } array(3) { [0]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(9) ["function"]=> string(26) "call_user_func_array_fixed" ["args"]=> array(2) { [0]=> string(13) "self::getName" [1]=> array(0) { } } } [1]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(88) ["function"]=> string(20) "call_user_func_fixed" ["args"]=> array(1) { [0]=> string(13) "self::getName" } } [2]=> array(7) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(105) ["function"]=> string(3) "run" ["class"]=> string(3) "Car" ["object"]=> object(Toyota)#4 (0) { } ["type"]=> string(2) "->" ["args"]=> array(0) { } } } Warning: call_user_func*() expects parameter 1 to be a valid callback: Attempting to call private method in an invalid context in /in/DlfI1 on line 78
Output for hhvm-3.10.0 - 3.13.2
object(ReflectionClass)#6 (2) { ["name"]=> string(3) "Car" ["obj":"ReflectionClass":private]=> NULL } array(3) { [0]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(9) ["function"]=> string(26) "call_user_func_array_fixed" ["args"]=> array(2) { [0]=> string(13) "self::getName" [1]=> array(0) { } } } [1]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(88) ["function"]=> string(20) "call_user_func_fixed" ["args"]=> array(1) { [0]=> string(13) "self::getName" } } [2]=> array(7) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(102) ["function"]=> string(3) "run" ["class"]=> string(3) "Car" ["object"]=> object(Car)#1 (0) { } ["type"]=> string(2) "->" ["args"]=> array(0) { } } } Warning: call_user_func*() expects parameter 1 to be a valid callback: Attempting to call private method in an invalid context in /in/DlfI1 on line 78 object(ReflectionClass)#10 (2) { ["name"]=> string(3) "Car" ["obj":"ReflectionClass":private]=> NULL } array(3) { [0]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(9) ["function"]=> string(26) "call_user_func_array_fixed" ["args"]=> array(2) { [0]=> string(13) "self::getName" [1]=> array(0) { } } } [1]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(88) ["function"]=> string(20) "call_user_func_fixed" ["args"]=> array(1) { [0]=> string(13) "self::getName" } } [2]=> array(7) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(105) ["function"]=> string(3) "run" ["class"]=> string(3) "Car" ["object"]=> object(Toyota)#5 (0) { } ["type"]=> string(2) "->" ["args"]=> array(0) { } } } Warning: call_user_func*() expects parameter 1 to be a valid callback: Attempting to call private method in an invalid context in /in/DlfI1 on line 78
Output for 5.1.1 - 5.6.28
object(ReflectionClass)#4 (1) { ["name"]=> string(3) "Car" } array(3) { [0]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(9) ["function"]=> string(26) "call_user_func_array_fixed" ["args"]=> array(2) { [0]=> &string(13) "self::getName" [1]=> &array(0) { } } } [1]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(88) ["function"]=> string(20) "call_user_func_fixed" ["args"]=> array(1) { [0]=> &string(13) "self::getName" } } [2]=> array(7) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(102) ["function"]=> string(3) "run" ["class"]=> string(3) "Car" ["object"]=> object(Car)#1 (0) { } ["type"]=> string(2) "->" ["args"]=> array(0) { } } } Warning: call_user_func*() expects parameter 1 to be a valid callback: Attempting to call private method in an invalid context in /in/DlfI1 on line 78 object(ReflectionClass)#5 (1) { ["name"]=> string(3) "Car" } array(3) { [0]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(9) ["function"]=> string(26) "call_user_func_array_fixed" ["args"]=> array(2) { [0]=> &string(13) "self::getName" [1]=> &array(0) { } } } [1]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(88) ["function"]=> string(20) "call_user_func_fixed" ["args"]=> array(1) { [0]=> &string(13) "self::getName" } } [2]=> array(7) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(105) ["function"]=> string(3) "run" ["class"]=> string(3) "Car" ["object"]=> object(Toyota)#4 (0) { } ["type"]=> string(2) "->" ["args"]=> array(0) { } } } Warning: call_user_func*() expects parameter 1 to be a valid callback: Attempting to call private method in an invalid context in /in/DlfI1 on line 78
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/DlfI1 on line 105
Process exited with code 255.
Output for 5.0.5
object(ReflectionClass)#4 (1) { ["name"]=> string(3) "Car" } array(3) { [0]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(9) ["function"]=> string(26) "call_user_func_array_fixed" ["args"]=> array(2) { [0]=> &string(13) "self::getName" [1]=> &array(0) { } } } [1]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(88) ["function"]=> string(20) "call_user_func_fixed" ["args"]=> array(1) { [0]=> &string(13) "self::getName" } } [2]=> array(6) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(102) ["function"]=> string(3) "run" ["class"]=> string(3) "Car" ["type"]=> string(2) "->" ["args"]=> array(0) { } } } Warning: call_user_func*() expects parameter 1 to be a valid callback: Attempting to call private method in an invalid context in /in/DlfI1 on line 78 object(ReflectionClass)#5 (1) { ["name"]=> string(3) "Car" } array(3) { [0]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(9) ["function"]=> string(26) "call_user_func_array_fixed" ["args"]=> array(2) { [0]=> &string(13) "self::getName" [1]=> &array(0) { } } } [1]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(88) ["function"]=> string(20) "call_user_func_fixed" ["args"]=> array(1) { [0]=> &string(13) "self::getName" } } [2]=> array(6) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(105) ["function"]=> string(3) "run" ["class"]=> string(3) "Car" ["type"]=> string(2) "->" ["args"]=> array(0) { } } } Warning: call_user_func*() expects parameter 1 to be a valid callback: Attempting to call private method in an invalid context in /in/DlfI1 on line 78
Output for 5.0.0 - 5.0.4
object(ReflectionClass)#4 (1) { ["name"]=> string(3) "Car" } array(3) { [0]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(9) ["function"]=> string(26) "call_user_func_array_fixed" ["args"]=> array(2) { [0]=> &string(13) "self::getName" [1]=> &array(0) { } } } [1]=> array(4) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(88) ["function"]=> string(20) "call_user_func_fixed" ["args"]=> array(1) { [0]=> &string(13) "self::getName" } } [2]=> array(6) { ["file"]=> string(9) "/in/DlfI1" ["line"]=> int(102) ["function"]=> string(3) "run" ["class"]=> string(3) "Car" ["type"]=> string(2) "->" ["args"]=> array(0) { } } } Warning: call_user_func*() expects parameter 1 to be a valid callback: Attempting to call private method in an invalid context in /in/DlfI1 on line 78 Fatal error: Call to undefined method ReflectionMethod::invokeArgs() in /in/DlfI1 on line 76
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/DlfI1 on line 17
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/DlfI1 on line 17
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/DlfI1 on line 17
Process exited with code 255.