why does not PHP include work?

Question

I have a strange problem. I have one file index.php in the root, and 2 files include directory inside the root.

root > index.php , include
include > config.php , db.php

In include/db.php I defined MySQL connection parameters like this:

$hostname = 'localhost';
$username = 'root';
$password = '';
$dbname   = 'mydb';

Then I have included this file inside include/config.php :

include 'db.php';

And finally, I've included include/config.php inside index.php.
The problem I have is I have not access to database variables when I run index.php. They are only available if I run include/config.php. But I expected I must have all defined variables inside these 2 files when I included them in index.php.

What is the problem ?

`index.php` includes `config.php` includes `db.php` — Is that correct? Also, how do you know you don't have access to the variables? What does `print_r(get_defined_vars());` output? — Amal Murali, May 26 '14 at 11:36
Is it really the `include()` that does not work? You should get an error if that is the case! — arkascha, May 26 '14 at 11:37
How have you tried to include config.php inside index.php? Syntax? — Kanishk Dudeja, May 26 '14 at 11:38
Are you getting any error/ Warning ? Did you check echoing variables in index.php file ? — vrh, May 26 '14 at 11:38
@AmalMurali, yes that's it. I put `echo $hostname;` after including db.php . When I run index.php , nothing appears, but when I run include/config.php , it shows mydb — Mohammad Saberi, May 26 '14 at 11:39
@KanishkDudeja, it has a common syntax. `include 'include/config.php';` — Mohammad Saberi, May 26 '14 at 11:40
@Theorem, no. I don't see any error. Nothing appears in the page. — Mohammad Saberi, May 26 '14 at 11:40
@AmalMurali, `print_r(get_defined_vars())` does not contain `dbname` and other variables. — Mohammad Saberi, May 26 '14 at 11:42
Okay try using require in index.php page instead of include, check if you get path error. — vrh, May 26 '14 at 11:43
@MohammadSaberi add this at the top of index.php and then show us the error `error_reporting(-1);` — zzlalani, May 26 '14 at 11:43
If you are getting blank screen you have to set error reporting On. — vrh, May 26 '14 at 11:45
Did you `print_r($GLOBALS);` and not sign of your vars there? Do what @zzlalani said by setting `error_reporting(E_ALL); ini_set("display_errors",1);` in the top of your `index.php` — , May 26 '14 at 11:46
I just tested locally and it works fine. I can only assume you're making a spelling mistake somewhere. — asprin, May 26 '14 at 11:46
@Theorem, I did it. Now errors say `Notice: Undefined variable: dbname in ...` — Mohammad Saberi, May 26 '14 at 11:47
@MohammadSaberi either the variables are may be defined in some function or class or you are trying to access them within some function or class, can you show us complete code? — zzlalani, May 26 '14 at 11:51
I found out something. If I write `include 'include/db.php';` in config.php , I can access to database variables inside index.php — Mohammad Saberi, May 26 '14 at 11:58

score 0 · Answer 1 · answered May 26 '14 at 12:19

0

if you have included config.php in index.php and db.php in config.php. Then index.php should be: include 'include/config.php'; and config.php should be: include 'include/db.php';

answered May 26 '14 at 12:19

SuperDJ

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why does not PHP include work?

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