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PHP Autoloader with spl_autoload

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Autoload for PHP that enables the definition of namespaces and folders in a list that is used in the spl_registered function for any number of unknown values. This specific function can be used with Joomla! 1.5 since it reload's Joomla!'s autoload class at conclusion.

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  1. <?php
  2. class TamkaAutoload
  3. {
  4.  
  5.   function loadApplicationClasses () {
  6.  
  7.   /*** nullify existing autoloads ***/
  8.   spl_autoload_register (null, false);
  9.  
  10.   /*** specify extensions that may be loaded ***/
  11.   spl_autoload_extensions('.php');
  12.  
  13.   function TamkaLoader ($class)
  14.   {                           
  15.    /*** retrieve namespaces and folders from configuration ***/
  16.    $serverConfig = new TamkaServer;                    
  17.    $namespaceArray = explode(",", $serverConfig->autoloadNamespaces);
  18.  
  19.    $autoloadFolderArray = explode(",", $serverConfig->autoloadFolders);                               
  20.  
  21.    /*** process each configuration name space ***/
  22.    for ($na = 0; $na < count($namespaceArray); $na++) {
  23.  
  24.     /*** remove name space value from class to find filename ***/
  25.     $classFilename = TamkaAutoLoad::extractFileName ($class, $namespaceArray[$na]);
  26.  
  27.     if ($classFilename == false) {
  28.       /*** namespace not used for class prefix ***/
  29.     } else {
  30.       /*** namespace matches ***/
  31.  
  32.       for ($fa = 0; $fa < count($autoloadFolderArray); $fa++) {
  33.       /*** namespace not used for class prefix ***/
  34.         $folderFile = TamkaAutoload::replaceSlashwithDirectorySeparator(TAMKA_BASE.trim($autoloadFolderArray[$fa]).DS.$classFilename);
  35.  
  36.         /*** require_once file, if exists, and exist ***/
  37.         $results = TamkaAutoLoad::requireFilename ($folderFile);                                         
  38.  
  39.         if ($results == true) {
  40.          $fa = count($autoloadFolderArray) + 1;
  41.          $na = count($namespaceArray) + 1;
  42.         }
  43.        } 
  44.       }
  45.      }
  46.     }
  47.  
  48.   /*** register the new loader function ***/
  49.   spl_autoload_register('TamkaLoader');               
  50.  
  51.   /*** RELOAD the Joomla! Autoload ***/
  52.   spl_autoload_register('__autoload');                            
  53.   }       
  54.  
  55.   function extractFileName ($class, $namespace) 
  56.   {
  57.     if (substr($class, 0, strlen($namespace)) == $namespace) {
  58.       return trim(substr($class, strlen($namespace), (strlen($class) - strlen($namespace)))).'.php';
  59.     } else {
  60.       return false;
  61.     }
  62.   }
  63.  
  64.   function replaceSlashwithDirectorySeparator ($filename) 
  65.   {  
  66.     return str_replace (chr(47), DS, $filename );      
  67.   }                        
  68.   function requireFilename ($file) 
  69.   {  
  70.     if (file_exists($file)) {
  71.       require_once $file;
  72.       return true;
  73.     } else {
  74.       return false;
  75.     }
  76.   }    
  77. }

URL: http://www.alltogetherasawhole.org/profiles/blogs/joomla-autoloader-using

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