Sessions and Filesystem

Cookies

• Stored on the browser
• Not very secure
• Don't use for sensitive information
• Uses: Storing user preferences

Sessions

• Stored on the server
• Relatively secure
• Can be used to store sensitive information
• Uses: Persistent user sessions

Filesystem

Writing to a file

            file_put_contents($filename, $data);
            file_put_contents($fn, $data, [, FILE_APPEND ]);
          

Reading a file

            file_get_contents($filename);
            file_get_contents($url);
          

Deleting a file

            unlink($filename);
          

List files in a directory

            scandir($directory);
          

Create a folder

            mkdir($path, $perms);
          

Delete a folder

            rmdir($path);
          

Rename a file

            rename($oldname, $newname);
          

Copy a file

            copy($source, $destination);
          

Check if a file or directory exists

            file_exists($path);
          

Check if the path points to a file

            is_file($path);
          

Check if the path points to a directory

            is_dir($path);
          

File propeties

            filesize($path); // Gets file size in bytes
            filemtime($path); // Last modified time
            fileowner($path); // Gets owner of file
            mime_content_type($path); // Gets file MIME type