<?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, $args);
}
// Get a reference to the target static method if possible
try {
if (!strcasecmp($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'])) {
trigger_error('call_user_func() expects parameter 1 to be a valid callback', E_USER_WARNING);
return null;
}
$class = new ReflectionClass($backtrace[$key]['class']);
// I know this looks odd, but it's what self:: does
$method = $class->getMethod($func[1])->getDeclaringClass()->getMethod($func[1]);
} else if (function_exists('get_called_class') && !strcasecmp($func[0], 'static')) {
$class = new ReflectionClass(get_called_class());
$method = $class->getMethod($func[1]);
} else {
$class = new ReflectionClass($func[0]);
$method = $class->getMethod($func[1]);
}
} catch (ReflectionException $e) {
trigger_error('call_user_func() expects parameter 1 to be a valid callback', 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('Toyota::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