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ReflectionParameter::getClass

(PHP 5, PHP 7, PHP 8)

ReflectionParameter::getClassGet a ReflectionClass object for the parameter being reflected or null

Aviso

Esta função tornou-se DEFASADA a partir do PHP 8.0.0. O uso desta função é fortemente desencorajado.

Descrição

public ReflectionParameter::getClass(): ?ReflectionClass

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.

Aviso

Esta função não está documentada; apenas a lista de argumentos está disponível.

Parâmetros

Esta função não possui parâmetros.

Valor Retornado

A ReflectionClass object, or null if no type is declared, or the declared type is not a class or interface.

Exemplos

Exemplo #1 Using the ReflectionParameter class

<?php
function foo(Exception $a) { }

$functionReflection = new ReflectionFunction('foo');
$parameters = $functionReflection->getParameters();
$aParameter = $parameters[0];

echo
$aParameter->getClass()->name;
?>

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User Contributed Notes 5 notes

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12
infernaz at gmail dot com
13 years ago
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

?>
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10
tom at r dot je
11 years ago
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;
}
?>
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5
Dylan
3 years ago
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.
up
1
tarik at bitstore dot ru
3 years ago
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());
}
up
-4
richard dot t dot rohrig at gmail dot com
3 years ago
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);
}
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