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(Hacky) DCI in PHP 5.4
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| <?php | |
| /*********************************************************************** | |
| UPDATE: See my improved example: https://gist.github.com/mbrowne/5047982 | |
| ************************************************************************/ | |
| ini_set('display_errors', 1); | |
| trait AssignableToRole | |
| { | |
| protected $methods = array(); | |
| public function addMethod($methodName, $methodCallable) | |
| { | |
| if (!is_callable($methodCallable)) { | |
| throw new InvalidArgumentException('Second param must be callable'); | |
| } | |
| $this->methods[$methodName] = Closure::bind($methodCallable, $this, get_class()); | |
| } | |
| public function removeMethod($methodName) | |
| { | |
| unset($this->methods[$methodName]); | |
| } | |
| //TODO: handle method name conflicts | |
| public function addRole($traitOrClassName) { | |
| if (trait_exists($traitOrClassName)) { | |
| $className = $traitOrClassName.'Class'; | |
| //We need a real class in order to be able to instantiate it, | |
| //so we can pass the instance to getClosure() below | |
| if (!class_exists($className)) { | |
| eval('class '.$className.' {use '.$traitOrClassName.';}'); | |
| } | |
| } | |
| elseif (!class_exists($traitOrClassName)) { | |
| throw new InvalidArgumentException("Trait or class named '$roleTraitName' is not defined"); | |
| } | |
| else $className = $traitOrClassName; | |
| $tmp = new $className; | |
| $reflClass = new ReflectionClass($tmp); | |
| $reflMethods = $reflClass->getMethods(); | |
| foreach ($reflMethods as $method) { | |
| $this->addMethod($method->name, $method->getClosure($tmp)); | |
| } | |
| } | |
| //TODO | |
| public function removeRole($traitOrClassName) { | |
| } | |
| public function __call($methodName, array $args) | |
| { | |
| if (isset($this->methods[$methodName])) { | |
| return call_user_func_array($this->methods[$methodName], $args); | |
| } | |
| throw RuntimeException('There is no method with the given name to call'); | |
| } | |
| } | |
| class Person | |
| { | |
| use AssignableToRole; | |
| } | |
| trait EmployeeRole | |
| { | |
| function work() { | |
| echo "I'm working on it..."; | |
| } | |
| } | |
| $person = new Person; | |
| $person->addRole('EmployeeRole'); | |
| $person->work(); |
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