PHP how to get list of all defined variable?

Question

How to get the list of defined variables and its values. eg define('DS', DIRECTORY_SEPARATOR);

How can I list all of them at the end of page to check all of them working as expected. Instead of printing all of them one by one.

I've tried get_defined_vars() But I'm getting all Super Global variables like below.

Array
(
    [GLOBALS] => Array
        (
            [GLOBALS] => Array
 *RECURSION*
            [_POST] => Array
                (
                )

            [_GET] => Array
                (
                )

            [_COOKIE] => Array
                (
                    [PHPSESSID] => tkv7odk47idt4r2ob7389tkr81
                    [CAKEPHP] => cep9tbooimh5kbhn8jovmaqgi1
                )

            [_FILES] => Array
                (
                )

            [_SERVER] => Array

But I want only those which I've mentioned using the define() statement.

Is there any way of getting it.

For the record, define defines constants, not variables. — user1233508
– user1233508, Commented Oct 20, 2012 at 4:24

Sibu · Accepted Answer · 2012-10-20 04:19:47Z

2

You can get this by using get_defined_constants

$constarray = get_defined_constants(true);
foreach($constarray['user'] as $key => $val)
    eval(sprintf('$_CONSTANTS[\'%s\'] = \'%s\';', addslashes($key), addslashes($val)));

answered Oct 20, 2012 at 4:19

Sibu

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Comments

Rubin Porwal · Accepted Answer · 2012-10-20 05:02:29Z

2

To retrieve all the defined constants in php script you can use the function get_defined_constants()

It will return an associative array of all constants defined in php script

For more documentation about get_defined_constants please refer the below url http://php.net/manual/en/function.get-defined-constants.php

answered Oct 20, 2012 at 5:02

Rubin Porwal

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Comments

Kalpesh Patel · Accepted Answer · 2012-10-20 04:19:13Z

1

Use get_defined_constants(); , refer http://php.net/manual/en/function.get-defined-constants.php

answered Oct 20, 2012 at 4:19

Kalpesh Patel

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Comments

KHALID · Accepted Answer · 2017-05-14 16:34:36Z

I use this code to get all define . you can include php file and use this code

              include("FILE.PHP");  

              GET_ALL_define();

            function GET_ALL_define(){

                    $getdefinedconstants = get_defined_constants(true);
                    $definedvars = $getdefinedconstants['user'];

                    foreach($definedvars as $key => $value){
                        echo $key ." = ". $value . "<br>";
                    }

            }

or without include php file like this code .

          define("_A","A1");
          define("_B","B2");   
          define("_C","C3");

              GET_ALL_define();

            function GET_ALL_define(){

                    $getdefinedconstants = get_defined_constants(true);
                    $definedvars = $getdefinedconstants['user'];

                    foreach($definedvars as $key => $value){
                        echo $key ." = ". $value . "<br>";
                    }

            }

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