Autoload classes from different folders

Question

This is how I autoload all the classes in my controllers folder,

# auto load controller classes
    function __autoload($class_name) 
    {
             


        

Answer 1

function autoload($className)
{
//list comma separated directory name
$directory = array('', 'classes/', 'model/', 'controller/');

//list of comma separated file format
$fileFormat = array('%s.php', '%s.class.php');

foreach ($directory as $current_dir)
{
    foreach ($fileFormat as $current_format)
    {

        $path = $current_dir.sprintf($current_format, $className);
        if (file_exists($path))
        {
            include $path;
            return ;
        }
    }
}
}
spl_autoload_register('autoload');

Answer 2

Everyone is is coping and pasting things from code they got off the internet (With the exception of the selected answer). They all use String Replace.

String Replace is 4 times slower than strtr. You should use it instead.

You should also use full paths when including classes with autoloading as it takes less time for the OS to resolve the path.

Answer 3

Altough this script doesn't have the name convention and this thread is already a bit old, in case someone is looking of a possible answer, this is what I did:

function __autoload($name) {
    $dirs = array_filter(glob("*"), 'is_dir');

    foreach($dirs as $cur_dir) {
        dir_searcher($cur_dir, $name);
    }

}

function dir_searcher($cur_dir, $name) {

    if(is_file("$cur_dir/$name.php")) {
        require_once "$cur_dir/$name.php";
    }

    $dirs = array_filter(glob($cur_dir."/*"), 'is_dir');
    foreach($dirs as $cdir) {
        dir_searcher("$cdir", $name);
    }
}

not sure if it is really optimal, but it searches through the folders by reading dir recursively. With a creative str_replace function you can get your name cenvention.

Answer 4

My version of @Mark Eirich answer:

    function myload($class) {
      $controllerDir = '/controller/';
      $modelDir = '/model/';
      if (strpos($class, 'controller') !== false) {              
        $myclass = $controllerDir . $class . '.php';
      } else {
        $myclass = $modelDir . $class . '.inc.php';
      }
          if (!is_file($myclass)) return false;
          require_once ($myclass);

    }

    spl_autoload_register("myload");

In my case only controller class have the keyword in their name, adapt it for your needs.

Answer 5

Simpliest answer I can give you without writing down those complex codes and even without using the namespace (if this confuses you)

Sample Code. Works 100%.

function __autoload($class_name){
$file = ABSPATH . 'app/models/' . $class_name . '.php';
if(file_exists($file)){
    include $file;
}else{
    $file = ABSPATH . 'app/views/' . $class_name . '.php';
    if(file_exists($file)){
        include $file;
    }else{
        $file = ABSPATH . 'app/controllers/' . $class_name . '.php';
        include $file;
    }
}

I guess the logic is explainable itself. Cheers mate! Hope this helps :)

Answer 6

You should name your classes so the underscore (_) translates to the directory separator (/). A few PHP frameworks do this, such as Zend and Kohana.

So, you name your class Model_Article and place the file in classes/model/article.php and then your autoload does...

function __autoload($class_name) 
{
    $filename = str_replace('_', DIRECTORY_SEPARATOR, strtolower($class_name)).'.php';

    $file = AP_SITE.$filename;

    if ( ! file_exists($file))
    {
        return FALSE;
    }
    include $file;
}

Also note you can use spl_autoload_register() to make any function an autoloading function. It is also more flexible, allowing you to define multiple autoload type functions.

If there must be multiple autoload functions, spl_autoload_register() allows for this. It effectively creates a queue of autoload functions, and runs through each of them in the order they are defined. By contrast, __autoload() may only be defined once.

Edit

Note : __autoload has been DEPRECATED as of PHP 7.2.0. Relying on this feature is highly discouraged. Please refer to PHP documentation for more details. http://php.net/manual/en/function.autoload.php