ReflectionClass::getReflectionConstants

Gets class constants

&reftitle.description; public `array` `ReflectionClass::getReflectionConstants` ``int``null```filter`&null;

Retrieves reflected constants.

&reftitle.parameters;

`filter`

- The optional filter, for filtering desired constant visibilities. It's configured using the ReflectionClassConstant constants, and defaults to all constant visibilities.

&reftitle.returnvalues;

An array of `ReflectionClassConstant` objects.

&reftitle.changelog;

&Version; | &Description;
8.0.0 | `filter` has been added.

&reftitle.examples;

### Basic `ReflectionClass::getReflectionConstants` example

    <?php
    class Foo {
        public    const FOO  = 1;
        protected const BAR  = 2;
        private   const BAZ  = 3;
    }

    $foo = new Foo();

    $reflect = new ReflectionClass($foo);
    $consts  = $reflect->getReflectionConstants();

    foreach ($consts as $const) {
        print $const->getName() . "\n";
    }

    var_dump($consts);

    ?>

&example.outputs.similar;

    FOO
    BAR
    BAZ
    array(3) {
      [0]=>
      object(ReflectionClassConstant)#3 (2) {
        ["name"]=>
        string(3) "FOO"
        ["class"]=>
        string(3) "Foo"
      }
      [1]=>
      object(ReflectionClassConstant)#4 (2) {
        ["name"]=>
        string(3) "BAR"
        ["class"]=>
        string(3) "Foo"
      }
      [2]=>
      object(ReflectionClassConstant)#5 (2) {
        ["name"]=>
        string(3) "BAZ"
        ["class"]=>
        string(3) "Foo"
      }
    }

&reftitle.seealso;

- `ReflectionClass::getReflectionConstant`
- `ReflectionClassConstant`