Defining PHP constants in header file doesnt work?

Question

I tried to define constants in my config.php file. Its primary use is just configuration, as I'm sure you guessed. But it isn't working. here's my config.php file:

<?php
    define("KPEREQUEST", "0", true);
    define("KPERESPONSE", "1", true);

    define("KPEGET", 0, true);
    define("KPEPOST", 1, true);
?>

and here's the result when I include config.php and print the define kPAPost:

KPEPOST: ""

but here's the result if i define the constants in index.php AND i print them from index.php:

KPEPOST: "1"

** EDIT **

heres my index.php file:

<?php
    $title = "API Documents";
    include 'header.php';
    include "config.inc.php";

    echo "KPEPOST: \"" . KPEPOST . "\""; 
?>

<?php include 'footer.php'; ?>

I've seen this done a million times in wordpress, magento, etc. I have no idea why this isn't working and I've done a ton of research to figure it out but I'm at a dead end now. Any help would be appreciated. Why can't I define a constant in a config file and use the define in files that include the config file?

printing the define: include "config.inc.php"; echo "KPEPOST: \"" . KPEPOST . "\""; — Katushai
– Katushai, Commented Sep 13, 2014 at 22:22
right thats what i meant. i showed the files though. thats a direct copy and paste — Katushai
– Katushai, Commented Sep 13, 2014 at 22:27
Please enable full error_reporting, and see what that says; and also use require instead of include. — C3roe
– C3roe, Commented Sep 13, 2014 at 22:32

Community · Accepted Answer · 2017-05-23 11:52:20Z

1

It sounds like you just don't have config.php (or that particular copy of config.php) in your include path.

Suggestion

Define a root index.php for your entire web app;

Do this:

define('BASE_DIR', realpath(__FILE__));

Then you can do this:
```
require_once BASE_DIR.'config.php';
```

1 Comment

Katushai Over a year ago

although i used dirname() instead of realpath()

Katushai · Accepted Answer · 2014-09-13 23:29:04Z

0

another possible solution is to use ./ in front of the filename during the include. i discovered it inadvertently.

define("kPEPost", "1");

and the include:

include("./header");
include("./includes/config.inc.php");

answered Sep 13, 2014 at 23:29

Katushai

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