minte9
LearnRemember / PHP



Private

You can't access private property from outside a class. 
 
class Foo 
{
    public    $foo  = 1;
    protected $bar  = 2;
    private   $baz  = 3;
}

$obj = new Foo();

echo $obj->baz; // Fatal error: Cannot access private property

Reflexion

Use reflection to get private property. 
 
class Foo 
{
    public    $foo  = 1;
    protected $bar  = 2;
    private   $baz  = 3;
}

$obj = new Foo();

$reflector = new ReflectionObject($obj);
$property = $reflector->getProperty('baz');
$property->setAccessible(true);

echo $property->getValue($obj); // 3
Get private properties. 
 
class Foo 
{
    public    $foo  = 1;
    protected $bar  = 2;
    private   $baz  = 3;
}

$foo = new Foo();

$reflector = new ReflectionObject($foo);
$properties = $reflector->getProperties(ReflectionProperty::IS_PRIVATE | 
                   ReflectionProperty::IS_PROTECTED);
array_map(function(&$x) { $x->setAccessible(true); }, $properties);
var_dump($properties);
/*
    array (size=2)
      0 => 
        object(ReflectionProperty)[3]
          public 'name' => string 'bar' (length=3)
          public 'class' => string 'Foo' (length=3)
      1 => 
        object(ReflectionProperty)[4]
          public 'name' => string 'baz' (length=3)
          public 'class' => string 'Foo' (length=3)
*/
Get parent properties. 
 
class Ford 
{ 
  private $model;
  protected $foo;
  public $bar;
}

class Car extends Ford 
{
  private $year;
}

$class = new ReflectionClass('Car');

var_dump($class->getProperties()); // First chunk of output

var_dump($class->getParentClass()->getProperties()); // Second chunk






Questions and answers




Create a reflexion for class foo {}

  • a) $ref = new ReflectionObject(new Foo());
  • b) $ref = new ReflectionClass(Foo);

Get private property outside the class

  • a) $p = $ref->getProperty("baz");
  • b) $p = $ref->getValue("baz");

Set reflection class property to public

  • a) $prop->setAccessible(true);
  • b) $prop->setPublic(true);


References