ReflectionClass::getConstants

(PHP 5)

ReflectionClass::getConstantsGets constants

Description

public array ReflectionClass::getConstants ( void )

Gets defined constants from a class.

Warning

This function is currently not documented; only its argument list is available.

Parameters

This function has no parameters.

Return Values

An array of constants. Constant name in key, constant value in value.

See Also

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User Contributed Notes 3 notes

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1
djhob1972 at yahoo dot com dot au
5 years ago
I was trying to determine how to get a var_dump of constants that are within an interface.  Thats right, not using any classes but the interface itself.

Along my travels I found it quite interesting that the ReflectionClass along with a direct call to the interface will also dump its constants.  Perfect!!!!

This was using PHP 5.3.1 and my example as below:-

1st File:

constants.php

<?php
<?php>

interface
MyConstants
{
   
// --------------------------
    // Programmatic Level
    // --------------------------
   
const DEBUG_MODE_ACTIVE       = FALSE;
    const
PHP_VERSION_REQUIREMENT = "5.1.2";
}
?>

=======
Second file:
=======

test.php

<?php>
include_once (
"constants.php");

$oClass = new ReflectionClass ('MyConstants');
$array = $oClass->getConstants ();
var_dump ($array);
unset (
$oClass);
?>

what you would get from the command line:-

?:\???\htdocs\????>php test.php
array(2) {
  ["DEBUG_MODE_ACTIVE"]=> bool(false)
  ["PHP_VERSION_REQUIREMENT"]=> string(5) "5.1.2"

But as you can see this can work quite well to your advantage in many ways so I truely hope this helps someone else with a similar headache in the future to come!

Enjoy!
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1
davide dot renzi at gmail dot com
5 months ago
If you want to return the constants defined inside a class then you can also define an internal method as follows:

<?php
class myClass {
    const
NONE = 0;
    const
REQUEST = 100;
    const
AUTH = 101;

   
// others...

   
static function getConstants() {
       
$oClass = new ReflectionClass(__CLASS__);
        return
$oClass->getConstants();
    }
}
?>
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0
shgninc at gmail dot com
1 year ago
I use a functions to do somthing base on the class constant name as below. This example maybe helpful for everybody.
<?php
public function renderData($question_type = NULL, $data = array()) {
       
$types = array();
       
$qt = new ReflectionClass(questionType);
       
$types = $qt->getConstants();
        if (
$type = array_search($question_type, $types)){
               
//.....Do somthing
}
}
?>
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