PHP namespace autoload -

trying understand how namespaces , autoload works on php

server.php located @ core/server.php

namespace core\server  {      class main      {         public function gettopic()         {             $get_params = $_get;                 if (empty($get_params)) $get_params = ['subtopic' => 'test'];                return $get_params;         }      } } 

and index.php

spl_autoload_register();  use core\server subtopic;  $test = new subtopic\main();  var_dump($test); 

it cant load class core/server/main

autoload doesn't work way. first explain how autoloaders works.

spl_autoload_register() function register function have in code server autoloader, standard function be:

define('app_path','/path/to/your/dir');  function auto_load($class) {     if(file_exists(app_path.$class.'.php'))     {         include_once app_path.$class.'.php';     } }  spl_autoload_register('auto_load'); 

the constant app_path path directory code lives. noticed param passed spl_autoload_register name of function, register function when class instanciated runs function.

now effective way use autoloaders , namespaces following:

file - /autoloader.php

define('app_path','/path/to/your/dir'); define('ds', directory_separator);  function auto_load($class) {     $class = str_replace('\\', ds, $class);     if(file_exists(app_path.$class.'.php'))     {         include_once app_path.$class.'.php';     } }  spl_autoload_register('auto_load'); 

file - /index.php

include 'autoloader.php';  $tree = new libs\tree();  $apple_tree = new libs\tree\appletree(); 

file - /libs/tree.php

namespace libs; class tree {    public function __construct()    {       echo 'builded '.__class__;    }  } 

file - /libs/tree/appletree.php

namespace libs\tree; class appletree {     public function __construct()     {        echo 'builded '.__class__;     }   } 

i'm using namespaces , autoload load functions in nicely way, can use namespace describe in dir class resides , uses autoloader magic load without problems.

note: used constant 'ds', because in *nix uses '/' , in windows uses '\', directory_separator don't have worry code going run, because "path-compatible"