diff --git a/docs/categories/01-Documentation/index.md b/docs/categories/01-Documentation/index.md
index e6804491..0ec166ea 100644
--- a/docs/categories/01-Documentation/index.md
+++ b/docs/categories/01-Documentation/index.md
@@ -49,6 +49,7 @@ You can find more detail about that in the ["How it works" section](./how-it-wor
 | Python               | https://github.com/miguelgrinberg/python-socketio                                                                                                       |
 | Golang               | https://github.com/googollee/go-socket.io                                                                                                               |
 | Rust                 | https://github.com/Totodore/socketioxide                                                                                                                |
+| PHP                  | https://github.com/walkor/phpsocket.io                                                                                                                  |
 
 ### Client implementations