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 — Convert a base class to an inherited class, add ancestral methods when appropriate
Descrição
bool runkit_class_adopt
( string
$classname
, string $parentname
)Parâmetros
-
classname -
Name of class to be adopted
-
parentname -
Parent class which child class is extending
Valor Retornado
Retorna TRUE em caso de sucesso ou FALSE em caso de falha.
Exemplos
Exemplo #1 A runkit_class_adopt() example
<?php
class myParent {
function parentFunc() {
echo "Parent Function Output\n";
}
}
class myChild {
}
runkit_class_adopt('myChild','myParent');
myChild::parentFunc();
?>
O exemplo acima irá imprimir:
Parent Function Output
Veja Também
- runkit_class_emancipate() - Convert an inherited class to a base class, removes any method whose scope is ancestral
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User Contributed Notes
runkit_class_adopt - [1 notes]
muramas at cyberdiscordia dot org ¶
7 years ago