- preg_match: documentation ( source)
- array_shift: documentation ( source)
- trigger_error: documentation ( source)
- is_callable: documentation ( source)
<?php
function call_user_func_fixed()
{
$args = func_get_args();
$callable = array_shift($args);
call_user_func_array_fixed($callable, $args);
}
function call_user_func_array_fixed($callable, $args)
{
$isStaticMethod = false;
if (is_object($callable) && $callable instanceof Closure) {
$func = $callable;
} else if (is_string($callable)) {
if (preg_match('/^([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)::([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)$/', $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;
$isStaticMethod = true;
}
}
if (!isset($callable) || !is_callable($callable)) {
trigger_error('call_user_func() expects parameter 1 to be a valid callback', E_USER_WARNING);
return null;
}
if (!$isStaticMethod) {
return call_user_func_array($func, $args);
}
try {
$class = new ReflectionClass($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;
}
return $method->invokeArgs($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