PHP require_once没有得到变量

Question

I'm trying to get a require_once to work, so I can use a variable content from my bootstrap file. I currently have the following file structure:

(folder) lib

(folder) templates

(file) bootstrap.php

On my bootstrap.php file I have the following array:

$config = array(
"db" => array(
    "db" => array(
        "dbname" => "name",
        "username" => "user",
        "password" => "pass",
        "host" => "localhost"
    ),
),
"paths" => array(
    "resources" => "/src",
)
);

On my lib folder I have the following 2 files:

Database.php User.php

Both of these are classes. In my User.php file I want to make use of the array defined in the bootstrap.php file, so I'm doing

require_once __DIR__ . '/../bootstrap.php';

where DIR is the current folder, and then down a level to where boostrap.php is located. But when I make the folowing call:

var_dump( $config );

I get:

Notice: Undefined variable: config in ...\src\lib\User.php on line 37
NULL 

Any idea on what I'm doing wrong?

Answer 1

Use include(file.php); or include_once(file.php); instead.

Answer 2

not sure but try this. EDITED

require_once('./../bootstrap.php');

or

require('./../bootstrap.php');

instead of this

require_once __DIR__ . '/../bootstrap.php';

Answer 3

I don't know the behaviour on UNIX systems but on Windows DIR outputs something line C:\\Apache24\\htdocs. Notice the back slashes there. That s not gonna work with file names unless you use DIR . "..\\libs\\User.php"

Answer 4

The arguments for require and require_once are relative to the script file being invoked by your php runtime. So if User.php is being required elsewhere (by your root index.php for example) the path being supplied to your require statement needs to be relative to index.php, regardless of which file your require statement is in.

If you look at how php frameworks deal with this problem, they typically setup some global APP_PATH variable in the bootstrap sequence (which is an absolute path to the project on disk).

That way, wherever you need to require something, you would base the path off of APP_PATH.