Im trying include PHPExcel lib to Yii, put PHPExcel.php in root of extensions, near PHPExcel folder and added that code into config/main.php

 // application components
'components'=>array(
  'excel'=>array(
  'class'=>'application.extensions.PHPExcel',
),

modify /protected/extensions/PHPExcel/Autoloader.php

public static function Register() {
  $functions = spl_autoload_functions();
  foreach($functions as $function)
    spl_autoload_unregister($function);
  $functions=array_merge(array(array('PHPExcel_Autoloader', 'Load')), $functions);
  foreach($functions as $function)
    $x = spl_autoload_register($function);
  return $x;
}//     function Register()

Then, trying create PHPExcel object $objPHPExcel = new PHPExcel(); but have an error: include(PHPExcel.php) [<a href='function.include'>function.include</a>]: failed to open stream: No such file or directory in Z:\home\yii.local\www\framework\YiiBase.php(418)