(PHP 5, PHP 7, PHP 8)
ReflectionParameter::getClass — Get a ReflectionClass object for the parameter being reflected or null
Diese Funktion ist seit PHP 8.0.0 als DEPRECATED (veraltet) markiert. Von der Verwendung dieser Funktion wird dringend abgeraten.
Gets a ReflectionClass object for the parameter being reflected or null.
As of PHP 8.0.0 this function is deprecated and not recommended. Instead, use ReflectionParameter::getType() to get the ReflectionType of the parameter, then interrogate that object to determine the parameter type.
Diese Funktion ist bis jetzt nicht dokumentiert. Es steht nur die Liste der Parameter zur Verfügung.
Diese Funktion besitzt keine Parameter.
A ReflectionClass object, or null if no type is declared,
or the declared type is not a class or interface.
Beispiel #1 Using the ReflectionParameter class
<?php
function foo(Exception $a) { }
$functionReflection = new ReflectionFunction('foo');
$parameters = $functionReflection->getParameters();
$aParameter = $parameters[0];
echo $aParameter->getClass()->name;
?>The method returns ReflectionClass object of parameter type class or NULL if none.
<?php
class A {
function b(B $c, array $d, $e) {
}
}
class B {
}
$refl = new ReflectionClass('A');
$par = $refl->getMethod('b')->getParameters();
var_dump($par[0]->getClass()->getName()); // outputs B
var_dump($par[1]->getClass()); // note that array type outputs NULL
var_dump($par[2]->getClass()); // outputs NULL
?>ReflectionParameter::getClass() will cause a fatal error (and trigger __autoload) if the class required by the parameter is not defined.
Sometimes it's useful to only know the class name without needing the class to be loaded.
Here's a simple function that will retrieve only the class name without requiring the class to exist:
<?php
function getClassName(ReflectionParameter $param) {
preg_match('/\[\s\<\w+?>\s([\w]+)/s', $param->__toString(), $matches);
return isset($matches[1]) ? $matches[1] : null;
}
?>For php version >=8
ReflectionParamter::getType() is the recommended way to replace the deprecated methods:
- getClass()
e.g: $name = $param->getType() && !$param->getType()->isBuiltin()
? new ReflectionClass($param->getType()->getName())
: null;
- isArray()
e.g: $isArray = $param->getType() && $param->getType()->getName() === 'array';
- isCallable()
e.g: $isCallable = $param->getType() && $param->getType()->getName() === 'callable';
This method is available in PHP 7.0 and later.You may use this one function instead depricated
/**
* Get parameter class
* @param \ReflectionParameter $parameter
* @return \ReflectionClass|null
*/
private function getClass(\ReflectionParameter $parameter):?\ReflectionClass
{
$type = $parameter->getType();
if (!$type || $type->isBuiltin())
return NULL;
// This line triggers autoloader!
if(!class_exists($type->getName()))
return NULL;
return new \ReflectionClass($type->getName());
}Example of how to use getClass() in conjunction with getConstructor() to build the dependencies of a class.
private function buildDependencies(ReflectionClass $reflection)
{
$constructor = $reflection->getConstructor();
if (!$constructor) {
return [];
}
$params = $constructor->getParameters();
return array_map(function ($param) {
$className = $param->getClass();
if (!$className) {
throw new Exception();
}
$className = $param->getClass()->getName();
return $this->make($className);
}, $params);
}