PHP - Php Autoload Classes

Well PHP5 has a function __autoload() which makes it possible to load classes when needed, thereby eliminating excessive lines of include() or require(). Now I have a question about this feature, lets assume we have a class file like this:

Code: [Select]
interface Shop{
   public function getshop();
   public function displayshop();
   public function purchase($name);
   public function sell($name);
   public function rent($name);
}

class Foodshop implements Shop{
  // codes here
}

class Bookshop implements Shop{
   // codes here
}

class Electronicshop implements Shop{
  // codes here
}

class Petshop implements Shop{
  // codes here
}

class Auction implements Shop{
  // codes here, note the class name auction does not contain shop substring...
}


If I instantiate an object from one of these classes that implement (or extend) an interface(or an abstract class), how should I design my __autoload() function so that this class file will be loaded properly? Please help.

Is using class autoload slower than including them yourself?

Should I include/require the class file and use class autoload as a backup in case I had forgotten, or can I just let class autoload load all the class files and never worry about including/requiring.

All classes are in the same directory and are always picked up - just want to know if it takes more time.

Is it much of a difference? Are we talking 1 or 2 milliseconds per request???

Please help.  I have tried to condense the following code to make it easier for someone to shed insight.  The results make totally no sense to me.   I have the following two lines of code:
 

require_once('/var/www/bidjunction/application/classes_3rd/htmlpurifier/library/HTMLPurifier.auto.php');
$config = HTMLPurifier_Conf::createDefault();

Let me explain what happens in these two lines of code.  First....

require_once('/var/www/bidjunction/application/classes_3rd/htmlpurifier/library/HTMLPurifier.auto.php'):

HTMLPurifier.auto.php is shown below:

<?php

/**
 * This is a stub include that automatically configures the include path.
 */

set_include_path(dirname(__FILE__) . PATH_SEPARATOR . get_include_path() );
require_once 'HTMLPurifier/Bootstrap.php';
require_once 'HTMLPurifier.autoload.php';

// vim: et sw=4 sts=4

The only thing Bootstrap.php does is define a class and execute the following line:
 

define('HTMLPURIFIER_PREFIX', realpath(dirname(__FILE__) . '/..'));

The only thing HTMLPurifier.autoload.php does is execute HTMLPurifier_Bootstrap::registerAutoload()  (which was one of the classes defined in Bootstrap.php). The only thing HTMLPurifier_Bootstrap::registerAutoload() does is:

spl_autoload_register(array('HTMLPurifier_Bootstrap','autoload'), true, true);

Now the second line:

$config = HTMLPurifier_Conf::createDefault();

I expected that HTMLPurifier_Conf::createDefault() would be executed, but no, instead the script goes to HTMLPurifier_Bootstrap:autoload() which returns false.

Next, the script goes to function PHPMailerAutoload() which is in PHPMailerAutoload.php.

What!!!  What does PHPMailerAutoload have to do with this?   While a perfect answer would be great, general comments and a strategy to troubleshoot be the next best thing.   I am stumped! Please help.

Hi every one,

i want to know, how do i autoload my class file in each page without using include directive.

Thanks

Not sure how to describe what I'm trying to do here in the title, but here goes with what I am trying to accomplish.

I've got a few hundred lines of code in total so far, so I'll try to keep it as short as I can. I've got an application that I am programming using classes for each module and right now I am coding the base classes that I need in order for it to run (database, errors, logging, etc). What I'm doing for my database class is I have a query factory and it extends the MySQLi class so I can process, clean and code the rest of my app faster. I also have another, unrelated class "Error", which will be used for processing errors I might come across.

I'd rather do it this way instead of having to call trigger_error and error_log every time there is an error. I'd also not like to have to call a new instance of an object every time I need to use something from that class. Is there any way I can call a class within a class and return it as an object for all the methods within the class?

I've tried the methods below, but no luck I've tried others, but I'm trying to keep it brief and get what I'm trying to do across.

<?php

class QueryFactory extends MySQLi {

public  $err = new error(); //Doesn't work.
public  $err = error(); //Nope.

#This is the function that I need the $err object for.
function set($fields, $newvals) {

if ( is_array($fields) && is_array($newvals) ) {

if ( count($fields) != count($newvals) ) {
//Instead of below, I want to do something like $err->('Array lengths must match for method', 256, $islogged = 1);
                              trigger_error('Array lengths must match for method', 256);
}

}
}

}


The thing is, I have a "run.inc.php" which does include and create new objects for running just the basic app and if I try to redeclare the error class in query.class.php, it gives me an error saying I can't do that, but if i try to call $err from the page that has all the classes defined it throws an error saying that my method is undeclared. I'd like my error class be available to every other class I create so I can display and log errors as needed. Any suggestions or links to point me where I'd like to go?

Evening,

So I have three files.

run.php
Code: [Select]
// autoload the classes
function __autoload($className) {
    include "class.".$className.".php";
}

// setup the sessions handler
$session = new Session($member);

// setup the handler
$handler = new Handler(part, template, $_GET);

The handler takes the $_GET data and includes the templates header -> $_GET matching body file -> footer and returns it forming a page.

However. When I go to call something from the Session class for example in the body file with...

body.tpl.php
Code: [Select]
<?=$Session->isLog();?>
I get...

Code: [Select]
Notice: Undefined variable: Session in .../body.tpl.php on line 12 Fatal error: Call to a member function isLog() on a non-object in .../body.tpl.php on line 12
It is my understanding that the class is ready for use, but isn't?

I'd really appreciate any advice you can spare.

Hello All,

I am fairly new to PHP class development, and I was wondering if it is normal behaviour to see classes not being able to access global variables related to PHP-based requests ($_GET, $_SESSION, etc.)? I seem to either have to use "global <var>" inside of the class to access the data, or I am forced to change the methods so then such required data is passed in as parameters. Perhaps I am just doing something wrong?

Here is an example of what I mean:

class Something
{
       function aFunc()
       {
               if (isset($_SESSION['somedata'])) { return false; } // this always returns false whether I had set the value or not
       }
       function bFunc()
       {
              global $_SESSION; // figured this would already be in a global accessible scope
              if (isset($_SESSION['somedata'])) { return false; } // now this will return false only when the value is set
       }
}


Now the above example is commented to demonstrate what I was meaning above, and I was wondering if this was the 'norm' when developing classes for PHP (and thus such values should be passed as parameters)?

Thanks!

Hi.

I want to know how I access calsses in PHP. I mean how I search for class that I want and need. do I need to search in php.net? and what editors that provide access the the whole php classes and who they keep updated?

Cheers.

Hi, I want to build a simple calculator class and one of the function is to calculate the factorial, but for some reason I cannot get this to work.

Here is class:
=========
Code: [Select]
<?php
class Calculator {

 function factorial($n) {
  if($n==1)
return 1;
  else 
return factorial($n-1)*$n;
 }
}//END CLASS Calculator

$calculator=new Calculator();
print $calculator->factorial(3);
?> 

But it doesn't work, I know this is simple but I am a little rusty with object oriented programming.

I'd appreciated any help!

Hi there,    This might a newbie question but I need help understanding PHP classes which am currently learning.    I have an index page.    With this three included files.    database.php config.php account.php    on database.php, the class is declared using $connection new Database(...), on this page is also all the coding for this class.   In config.php is a declared class of $account new Account($user_id);   and on account.php is all the details for the account class.    on the index.php is echo $account->sayHello;    However, My page is throwing out an error because I'm trying to use $connection->query(..) in my account.php / Account class.    I have tried to extend the Account class with Database but still have no luck.    How can I make sure the I can use a class function from another page in my Account class?        Thanks for reading

I have just start using PHP classes and was wondering how you continue an instance of a class in another file.  For example I have a folder called "includes" where I includes files that I send data to when I perform ajax request.  However how do I continue an instance of class in these files?  Hope that makes sense. 

Thanks for any help. 

Hello,

maybe back to basics, but

  [PHP] pobierz, plaintext

How can i get my class to be showed on the front page
here is the front page
<?php
require('ex2.php');
$start = new A();
$tart->Display();
?>
now here is ex2.php
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);

class A
{
    public $title = "test1";
    public $end = "test2";
}   
function __set($name, $value)
    {
        $this->$name = $value;
    }
function Display()
{
    echo $title;
    echo $end;
}

?>
shoudn't this print test1 and test2 ?

im currently doing a large php project and i am confident i can do it. Its a basic forum like phpbb or mybb where users can download the files and instal. however i have looked through their code and i see they use classes. I have never learned to do classes since i havent had to use them yet. should i be using them now for this project? do i need to? and if so then what are the benefits?