The ReflectionProperty class

Einführung

The ReflectionProperty class reports information about a classes properties.

Klassenbeschreibung

ReflectionProperty implements Reflector {

/* Konstanten */

const integer ReflectionProperty::IS_STATIC = 1 ;

const integer ReflectionProperty::IS_PUBLIC = 256 ;

const integer ReflectionProperty::IS_PROTECTED = 512 ;

const integer ReflectionProperty::IS_PRIVATE = 1024 ;

/* Eigenschaften */

public $name ;

public $class ;

/* Methoden */

final private void __clone ( void )

__construct ( mixed $class , string $name )

public static string export ( mixed $class , string $name [, bool $return ] )

public ReflectionClass getDeclaringClass ( void )

public string getDocComment ( void )

public int getModifiers ( void )

public string getName ( void )

public mixed getValue ([ string $object ] )

public bool isDefault ( void )

public bool isPrivate ( void )

public bool isProtected ( void )

public bool isPublic ( void )

public bool isStatic ( void )

public void setAccessible ( bool $accessible )

public void setValue ( object $object , mixed $value )

public string __toString ( void )

}

Eigenschaften

name: Prop description
class: Prop description

Vordefinierte Konstanten

ReflectionProperty Node Types

ReflectionProperty::IS_STATIC: Description here...
ReflectionProperty::IS_PUBLIC: Description here...
ReflectionProperty::IS_PROTECTED: Description here...
ReflectionProperty::IS_PRIVATE: Description here...

Inhaltsverzeichnis

ReflectionProperty::__clone — Clone
ReflectionProperty::__construct — Construct a ReflectionProperty object
ReflectionProperty::export — Export
ReflectionProperty::getDeclaringClass — Gets declaring class
ReflectionProperty::getDocComment — Gets doc comment
ReflectionProperty::getModifiers — Gets modifiers
ReflectionProperty::getName — Gets property name
ReflectionProperty::getValue — Gets value
ReflectionProperty::isDefault — Checks if default value
ReflectionProperty::isPrivate — Checks if property is private
ReflectionProperty::isProtected — Checks if property is protected
ReflectionProperty::isPublic — Checks if property is public
ReflectionProperty::isStatic — Checks if property is static
ReflectionProperty::setAccessible — Set property accessibility
ReflectionProperty::setValue — Set property value
ReflectionProperty::__toString — To string

4 BenutzerBeiträge:
- Beiträge aktualisieren...

james at digitaledgeit dot com dot au
30.08.2010 5:30


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!

james at digitaledgeit dot com dot au
30.08.2010 5:22


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.

rasmus at mindplay dot dk
30.07.2010 14:06


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...

CodeDuck at gmx dot net
8.02.2006 17:07


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');





?>

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