ReflectionProperty::__construct

(PHP 5, PHP 7, PHP 8)

ReflectionProperty::__constructConstruct a ReflectionProperty object

Description

public ReflectionProperty::__construct(object|string $class, string $property)

Parameters

class

Either a string containing the name of the class to reflect, or an object.

property

The name of the property being reflected.

Errors/Exceptions

Trying to get or set private or protected class property's values will result in an exception being thrown.

Examples

Example #1 ReflectionProperty::__construct() example

<?phpclass Str{    public $length  = 5;}// Create an instance of the ReflectionProperty class$prop = new ReflectionProperty('Str', 'length');// Print out basic informationprintf(    "===> The%s%s%s%s property '%s' (which was %s)\n" .    "     having the modifiers %s\n",        $prop->isPublic() ? ' public' : '',        $prop->isPrivate() ? ' private' : '',        $prop->isProtected() ? ' protected' : '',        $prop->isStatic() ? ' static' : '',        $prop->getName(),        $prop->isDefault() ? 'declared at compile-time' : 'created at run-time',        var_export(Reflection::getModifierNames($prop->getModifiers()), 1));// Create an instance of Str$obj= new Str();// Get current valueprintf("---> Value is: ");var_dump($prop->getValue($obj));// Change value$prop->setValue($obj, 10);printf("---> Setting value to 10, new value is: ");var_dump($prop->getValue($obj));// Dump objectvar_dump($obj);?>

The above example will output something similar to:

===> The public property 'length' (which was declared at compile-time)
     having the modifiers array (
  0 => 'public',
)
---> Value is: int(5)
---> Setting value to 10, new value is: int(10)
object(Str)#2 (1) {
  ["length"]=>
  int(10)
}

Example #2 Getting value from private and protected properties using ReflectionProperty class

<?phpclass Foo {    public $x = 1;    protected $y = 2;    private $z = 3;}$obj = new Foo;$prop = new ReflectionProperty('Foo', 'y');$prop->setAccessible(true);var_dump($prop->getValue($obj)); // int(2)$prop = new ReflectionProperty('Foo', 'z');$prop->setAccessible(true);var_dump($prop->getValue($obj)); // int(2)?>

The above example will output something similar to:

int(2)
int(3)

See Also