Runkit_Sandbox_Parent
Function visibility (in PHP5) has some quirks as compared to the normal behavior with "extends". Consider the following:
<?php
class base {
public function a() { $this->b(); }
private function b() { echo "This is b()"; }
}
?>
This will work fine:
<?php
class inherit extends base {
public function c() { $this->a(); }
}
$x = new inherit;
$x->c();
?>
while this:
<?php
class adopt {
public function c() { $this->a(); }
}
runkit_class_adopt('adopt','base');
$x = new adopt;
$x->c();
?>
will generate a fatal "Call to private method base::b() from context 'adopt'" error. Protected members can be called from the inherited methods, but still cannot be called from the original class (i.e. if b() were declared protected, the example would work as written, but adopt::c() still could not call base::b() directly.
Functions such as is_subclass_of(), is_a(), and the instanceof operator also do not detect the new lineage of the object; if you are using this function to simulate multiple or dynamic inheritance, you may need to implement your own method of determining class lineage.
[EDIT by danbrown AT php DOT net: Merged addendum to post by original author.]
runkit_class_adopt
(PECL runkit >= 0.7.0)
runkit_class_adopt — Convertit une classe de base à une classe héritée, ajoute une méthode ancestrale lorsque approprié
Description
bool runkit_class_adopt
( string
$classname
, string $parentname
)Liste de paramètres
-
classname -
Le nom de la classe à adopter
-
parentname -
Classe parente pour laquelle la classe enfant s'étend
Valeurs de retour
Cette fonction retourne TRUE en cas de
succès ou FALSE si une erreur survient.
Exemples
Exemple #1 Exemple avec runkit_class_adopt()
<?php
class myParent {
function parentFunc() {
echo "Sortie Fonction Parente\n";
}
}
class myChild {
}
runkit_class_adopt('myChild','myParent');
myChild::parentFunc();
?>
L'exemple ci-dessus va afficher :
Sortie Fonction Parente
Voir aussi
- runkit_class_emancipate() - Convertit une classe héritée à une classe de base, supprime toute méthode pour qui la portée est ancestrale
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User Contributed Notes
runkit_class_adopt
muramas at cyberdiscordia dot org
02-Sep-2005 03:09