[TUTORIAL] Defining Paths in PHP

RageD · 08-18-2008, 11:56 AM

As many of you can probably see I haven't been around the forum in around a month or so. Been kind of busy upon other things and have been getting a lot of questions about doing different things in PHP. So this may be the first in possibly a series of tutorials to get all questions answered

In this tutorial I'll explain "define" pretty much and how to get it to define something like "ROOT_PATH". (not being so much a variable)

Unless you feel like defining everything in every file, I suggest the best way to define is make a file called something like "init.php". That's what I'll be using for the example.

init.php

PHP Code:

  <?php

/**

 * init.php for "Defining Paths in PHP" Tutorial by RageD

 * (C) 2008 RageD

 *

 */

 
/**

 * This first one is simply for security. Accessing functions

 * without proper access is bad :(

 *

 */

define("SITE_SCRIPT", true);

 
/**

 * Here we'll define the root path. Make sure that this file

 * is in the ROOT directory! :)

 *

 */

define("ROOT_PATH", dirname(__FILE__));

 
/**

 * And finally.. Our includes. In this example it will be the

 * "includes" directory.

 *

 */

define("INC_PATH", ROOT_PATH . '/includes');

 
/**

 * Final step... Make sure that this worked properly

 * :)

 *

 */

define("INIT_DONE", true);

????: NamePros.com http://www.namepros.com/webmaster-tutorials/505063-tutorial-defining-paths-in-php.html
?>

Now make a directory call includes and then a file called function.php.

includes/function.php

PHP Code:

  <?php

/**

 * includes/function.php for "Defining Paths in PHP" Tutorial by RageD

 * (C) 2008 RageD

 *

 */

// This is where that security definition comes into play :)

if(!defined("SITE_SCRIPT"))

{

     print("Unauthorized Access!");

     exit;

}

 
// Next, just a simple class and function example.

class Test

{

    /**

     * Constructor :)

     *

     */

    function __construct()

    {

        $this->text = "Hello World!<br />This script actually does work! :D";

    }

 
    /**

     * Basically just print $this->text

     *

     */

    function hello()

    {

        echo($this->text);

        exit;

    }

}

?>

Now finally just put this in an index.php or something so you can view it all done right

index.php

PHP Code:

  <?php

/**

 * includes/function.php for "Defining Paths in PHP" Tutorial by RageD

 * (C) 2008 RageD

 *

 */

 
// Place this file in the ROOT directory with init.php

require_once("init.php");

 
// Check if it worked properly or not

if(!defined("INIT_DONE"))

{

    echo("Doh! Houston, we have a problem. We did not initiate correctly!");

    exit;

}

 
// Get our function :D

require_once(INC_PATH . "/function.php");

????: NamePros.com http://www.namepros.com/showthread.php?t=505063
 
$test = new Test; // Define our class so we can perform the function.

 
$test->hello(); // Run the function!

?>

I've even attached a copy of the script for anyone interested.

Any questions, let me know

-RageD

**-Nick-** · 08-19-2008, 06:20 AM

Great explanation.

Can also be used somewhere where we define database settings

Thanks for writing it.

08-19-2008, 06:20 AM	#2 (permalink)
-Nick- I'll do it Join Date: Dec 2005 Location: India Posts: 6,939 Follow @keralpatel	Great explanation. Can also be used somewhere where we define database settings Thanks for writing it. __________________ Delq\|Fhur\|Kegh\|Vhir\|Juhy\|Ruuz\|Jyos\|Jupt\|Vhek Webmaster Blog \| Software Downloads Makeup & Beauty Tips \| Sponsor Ads

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