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...The component architecture allows you to focus on functionality with the ability to reuse and add or remove other component functionality. Ratchet is fully PSR-4 compliant, so it naturally plays well with others. Leveraging components from Symfony2, development should feel similar to many. Ratchet passes all WebSocket tests to ensure it works on all supported browsers.
...ws_get_frame_info() - Gets information about an upcoming websockets frame
ws_read_frame() - Reads the data of a websockets frame from a client or server
ws_send_close() - Sends a close frame to the websockets peer
ws_send_ping() - Sends a ping frame to the websockets peer
ws_send_pong() - Sends a pong frame to the websockets peer
These functions are written in low level C so they are fast when compared with functions that are written in PHP, especially for operations like sending and receiving larger binary files.