PHPはファイルダウンロード機能を実現し、圧縮パッケージの破損と開けられない解決方法を提示する.

//     
	public static function downFile($id,$admin_id,$cid,$type)
	{

		$company = checkAdminCompany($admin_id,$cid);
        if (!$company) {
            return [
                'status' => -4,
                'statusMsg' => '     '
            ];
        }
        if ($type=='file') {

        	//            
			$checkFileRole = self::checkFileRole($admin_id,$cid,$id);
			if (!$checkFileRole) {
				return [
					'status' => 777,
					'statusMsg' => '      '
				];
			}

        	$select_sql = "SELECT * FROM cloud_storage WHERE id in ($id)";
			send_execute_sql($select_sql,$fileInfo);

        } elseif ($type == 'list') {

        	//                
			$checkRole = self::checkRole($admin_id,$cid,$id);
			if (!$checkRole) {
				return [
					'status' => '777',
					'statusMsg' => '      '
				];
			}

        	$select_sql = "SELECT * FROM cloud_storage WHERE list_id = $id";
			send_execute_sql($select_sql,$fileInfo);
        }

		if (empty($fileInfo)) {
        	return [
				'status' => -400,
				'statusMsg' => '     '
			];
        }
 	
        foreach ($fileInfo as $key => $value) {
			$paths[$key] = $fileInfo[$key]['path'];
		}

        //             ，        
		$filename = 'logs/down/test.zip'; 
		if(!file_exists($filename)){
			$zip = new ZipArchive();
		 	if ($zip->open($filename, ZipArchive::CREATE)==TRUE) {
				foreach( $paths as $val){
				   if(file_exists($val)){
				    	$zip->addFile( $val, basename($val));
			   		}
			  	}
			  	$zip->close();
		 	}
		}
		if(!file_exists($filename)){
		 	exit("      ");
		}
		header("Cache-Control: public");
		header("Content-Description: File Transfer");
		header('Content-disposition: attachment; filename='.basename($filename)); //   
		header("Content-Type: application/zip"); //zip   
		header("Content-Transfer-Encoding: binary"); //     ，       
		header('Content-Length: '. filesize($filename)); //     ，    
		
		ob_clean();
		flush();

		@readfile($filename);
		unlink($fileurl);
	    exit;
		
	}