PHP autoload实现自动加载类

/* autoload.php */   
function __autoload($classname) {
  require_once ($classname . “class.php”);
}    
$person = new Person(”Altair”, 6);
var_dump ($person);
?>    

$paths[] = BP . DS . ‘app’ . DS . ‘local’;
$paths[] = BP . DS . ‘app’ . DS . ‘base’;
$paths[] = BP . DS . ‘lib’;

$appPath = implode(PS, $paths);
set_include_path($appPath . PS . get_include_path());

class Autoload {

/**
* 自身对象
*
*/
protected static $_instance = null;

public function __construct() {

}

/*
* 实例化自身
*
*/

public static function instance() {
if (null == self::$_instance) {
self::$_instance = new self();
}

return self::$_instance;
}

/**
*
* 注册自动加载函数
*/
public static function register() {
spl_autoload_register(array(self::instance(), ‘autoload’));
}

/*
*
* 自动加载类
*/

public function autoload($class) {
if (!is_string($class)) {
return;
}

$classFile = str_replace(‘ ‘, DS, ucwords(str_replace(‘_’, ‘ ‘, $class)));
$classFile .= ‘.php’;
return include $classFile;
}

}