关于php：Codeigniter上传不允许的文件不产生错误

    $config [ ‘upload_path’ ] = ‘./profile_img/’ ;
    $config [ ‘allowed_types’ ] = ‘gif|jpg|png’ ;
    $config [ ‘max_size’ ] = ‘100’ ;
    $config [ ‘max_width’ ]   = ‘1024’ ;
    $config [ ‘max_height’ ]   = ‘768’ ;

    $this -> load -> library ( ‘upload’ , $config ) ;

    if ( isset ( $_FILES [ ‘userfile’ ] ) && $_FILES [ ‘userfile’ ] [ ‘size’ ] > 0 ) {  
        if ( ! $this -> upload -> do_upload ( ‘userfile’ ) )
        {
                $error = $this -> upload -> display_errors ( ) ;
                $this -> session -> set_userdata ( “message” , $error ) ;
                header ( “Location: /page/account” ) ;
        }
        else
        {
                $upload_data = $this -> upload -> data ( ) ;
                $photo = $upload_data [ ‘file_name’ ] ;
        }
    }

    $data = array (
        ‘first_name’ => $this -> input -> post ( “first_name” ) ,
        ‘last_name’ => $this -> input -> post ( “last_name” ) ,
        ‘username’ => $this -> input -> post ( “username” ) ,
        ‘default_meeting_duration’ => $this -> input -> post ( “default_meeting_duration” ) ,
        ‘notification_type’ => $this -> input -> post ( “notification_type” ) ,
        ‘photo’ => $photo
    ) ;

    $this -> user_model -> update ( $data , $this -> ion_auth -> get_user_id ( ) ) ;
    $this -> session -> set_userdata ( “message” , “Account Settings Saved” ) ;
    header ( “Location: /page/account” ) ;