ReflectionParameter::__toString
Beware, the Reflection reflects only the information right after compile time based on the definitions, not based on runtime objects. Might be obvious, wasn't for me, until the app throws the exception at my head.
Example:
<?php
class A {
public $a = null;
function set() {
$this->foo = 'bar';
}
}
$a = new A;
$a->set();
// works fine
$Reflection = new ReflectionProperty($a, 'a');
// throws exception
$Reflection = new ReflectionProperty($a, 'foo');
?>
Clase ReflectionProperty
(PHP 5)
Introducción
La clase ReflectionProperty muestra información sobre las propiedades de una clase.
Sinopsis de la Clase
Propiedades
- name
-
Nombre de la propiedad. De sólo lectura, lanza una ReflectionException en un intento de escribir.
- class
-
Nombre de la clase donde se define la propiedad. De sólo lectura, lanza una ReflectionException en un intento de escribir.
Constantes predefinidas
Tabla de contenidos
- ReflectionProperty::__clone — Clonar
- ReflectionProperty::__construct — Construye un objeto de tipo ReflectionProperty
- ReflectionProperty::export — Exportar
- ReflectionProperty::getDeclaringClass — Obtiene la clase en la que se declaró
- ReflectionProperty::getDocComment — Obtiene los comentarios de documentación
- ReflectionProperty::getModifiers — Obtiene los modificadores
- ReflectionProperty::getName — Obtiene el nombre de la propiedad
- ReflectionProperty::getValue — Obtiene el valor
- ReflectionProperty::isDefault — Comprueba si la propiedad es predeterminado
- ReflectionProperty::isPrivate — Comprueba si una propiedad es privada
- ReflectionProperty::isProtected — Comprueba si la propiedad está protegida
- ReflectionProperty::isPublic — Comprueba si la propiedad es pública
- ReflectionProperty::isStatic — Comprueba si la propiedad es estática
- ReflectionProperty::setAccessible — Hace accesible una propiedad
- ReflectionProperty::setValue — Establece el valor de la propiedad
- ReflectionProperty::__toString — Convertir a texto
add a note
User Contributed Notes
ReflectionProperty - [4 notes]
CodeDuck at gmx dot net ¶
7 years ago
james at digitaledgeit dot com dot au ¶
2 years ago
Please ignore my previous note. I didn't fully understand what the previous notes were referring to as "runtime". I now see they were referring to a slightly different question.
Apologies!
rasmus at mindplay dot dk ¶
2 years ago
I think a more accurate explanation is this:
The Reflection classes are designed to reflect upon the source code of an application, not on any runtime information.
I think you misunderstand the ReflectionProperty constructor in your example above. The fact that it accepts an object as argument is just a convenience feature - you are actually inspecting the class of that object, not the object itself, so it's basically equivalent to:
<?php
// works fine
$Reflection = new ReflectionProperty(get_class($a), 'a');
// throws exception
$Reflection = new ReflectionProperty(get_class($a), 'foo');
?>
Getting the class of the object you're passing in is implied, since inspecting a defined property is the purpose of this class.
In your example, $a->foo is a dynamic member - it is not defined as a member of class, so there is no defining class reference, line number, default value, etc. - which means, there is nothing to reflect upon.
Clearly this very useful library could use some real documentation...
james at digitaledgeit dot com dot au ¶
2 years ago
You CAN reflect an object at runtime:
<?php
class Abc {
private $_abc = 123;
public function __construct($abc) {
$this->_abc = $abc;
}
}
$obj = new Abc('def');
$refl = new \ReflectionObject($obj);
$prop = $refl->getProperty('_abc');
$prop->setAccessible(true);
echo $prop->getValue($obj);
?>
This outputs 'def', the value of _abc set at runtime.