<?php
namespace Illuminate\Routing;
use Illuminate\Support\Reflector;
use Illuminate\Support\Str;
use ReflectionFunction;
use ReflectionMethod;
class RouteSignatureParameters
{
/**
* Extract the route action's signature parameters.
*
* @param array $action
* @param string|null $subClass
* @return array
*/
public static function fromAction(array $action, $subClass = null)
{
$callback = RouteAction::containsSerializedClosure($action)
? unserialize($action['uses'])->getClosure()
: $action['uses'];
$parameters = is_string($callback)
? static::fromClassMethodString($callback)
: (new ReflectionFunction($callback))->getParameters();
return is_null($subClass) ? $parameters : array_filter($parameters, function ($p) use ($subClass) {
return Reflector::isParameterSubclassOf($p, $subClass);
});
}
/**
* Get the parameters for the given class / method by string.
*
* @param string $uses
* @return array
*/
protected static function fromClassMethodString($uses)
{
[$class, $method] = Str::parseCallback($uses);
if (! method_exists($class, $method) && Reflector::isCallable($class, $method)) {
return [];
}
return (new ReflectionMethod($class, $method))->getParameters();
}
}