CODEWITHSUNDEEP
phpreflectionparent
johnnietheblack
johnnietheblack

Reputation: 13320

How to get the parent object in PHP, from OUTSIDE the object itself?

I am using Reflections to adjust various values in objects, and I have an object who's parent I need to adjust.

For example:

class Ford extends Car
{
    private $model;
}

class Car
{
    private $color;
}

I can easily use Reflection to change the model, but how can I separate the parent from the child, so that I can use Reflection on the parent?

Some psuedo code for what I'm hoping is possible:

$ford = new Ford();

$manipulator = new Manipulator($ford);

$manipulator->set('model','F-150');
$manipulator->setParentValue('color','red');

class Manipulator
{
    public function __construct($class) {
        $this->class = $class;
        $this->reflection = new \ReflectionClass($class);
    }

    public function set($property,$value) {
        $property = $this->reflection->getProperty($property);
        $property->setAccessible(true);
        $property->setValue($this->class,$value);
    }

    public function setParentValue() {

        $parent = $this->reflection->getParent();

        $property = $this->reflection->getProperty($property);
        $property->setAccessible(true);

        // HOW DO I DO THIS?

        $property->setValue($this->class::parent,$value);
    }
}

Gist of the question:

In this case, how can I change the $color from outside the object altogether?

Is there something like Ford::parent() or get_parent_object($ford) available?

Note

The objects used above are not the exact scenario, but just used to illustrate the concept. In the real world case, I have a parent/child relationship, and I need to be able to access/change values in each from the outside.

ANSWER

Please check my answer below...I figured it out.

Upvotes: 1

Views: 5333

Answers (4)

myxaxa
myxaxa

Reputation: 1381

function getPrivateProperty(\ReflectionClass $class, $property)
{
    if ($class->hasProperty($property)) {
        return $class->getProperty($property);
    }

    if ($parent = $class->getParentClass()) {
        return getPrivateProperty($parent, $property);
    }

    return null;
}

Upvotes: 1

NobleUplift
NobleUplift

Reputation: 6015

Here is the static version of the function I answered your other question with:

function getProperties($object) {
    $properties = array();
    try {
        $rc = new \ReflectionClass($object);
        do {
            $rp = array();
            /* @var $p \ReflectionProperty */
            foreach ($rc->getProperties() as $p) {
                $p->setAccessible(true);
                $rp[$p->getName()] = $p->getValue($object);
            }
            $properties = array_merge($rp, $properties);
        } while ($rc = $rc->getParentClass());
    } catch (\ReflectionException $e) { }
    return $properties;
}

Upvotes: 0

johnnietheblack
johnnietheblack

Reputation: 13320

After extensive review, I have found that I can't access the parent of an object AS AN OBJECT outside of the object itself.

However, using Reflections, I was able to solve the example posted above:

    <?php
class Car
{
    private $color;

    public function __construct()
    {
        $this->color = 'red';
    }

    public function color()
    {
        return $this->color;
    }
}

class Ford extends Car
{
}

$ford = new Ford();

echo $ford->color(); // OUTPUTS 'red'

$reflection = new ReflectionClass($ford);

$properties = $reflection->getProperties();
foreach($properties as $property) {
    echo $property->getName()."\n>";
}

$parent = $reflection->getParentClass();

$color = $parent->getProperty('color');
$color->setAccessible(true);
$color->setValue($ford,'blue');

echo $ford->color(); // OUTPUTS 'blue'

See it in action here: http://codepad.viper-7.com/R45LN0

Upvotes: 4

brunobg
brunobg

Reputation: 846

See get_parent_class(): http://php.net/manual/en/function.get-parent-class.php

Upvotes: 1

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