php-websocket | Simple WebSocket server implemented in PHP | Websocket library

Before getting started with the actual question, I’d like to make a notice of being an extreme beginner to the world of web sockets using PHP. As a matter of fact, I’m still trying to grasp the very basics of it. I do however have lots of experience with sockets overall, from languages such as Java.

Upon doing my research, I stumbled upon the tutorial from PHP builder, whereas I think myself to having learned how to set socket connections up using this simple library.

Unto the problem we go. For a development server, I have chosen to go with XAMPP—it’ss sort of stayed with me from my Windows days, many years ago. At this very moment, I am using the terminal UI for XAMPP in Ubuntu—meaning, I launch the XAMPP server and then do a killall should I ever wish to close it.

In the tutorial mentioned above, you enter this information into your PHP document where you keep your server socket:

I've tested several libraries (workerman and PHP-Websockets) but in all cases I have the same issue - when I open clients page everything is all right, I have websocket connection with my server, but later it disconnects automatically in a few minutes or less. Is it known issue or is there any methods to handle it? Or should I simply implement some function to force recconection if websocket fails?

This is a code sample for workerman

Server test_ws.php

I was able to setup WebSocket on Azure.WebSockets enabled on Azure

But my issue is : how to start the PHP ws server?

I have used this sample implementation https://github.com/ghedipunk/PHP-Websockets successfuy on my computer but I am not able to start the server in MS Azure.

I am new to WebSocket world and even after a week, I still could not find how to use it with PHP without using any 3rd Party Library. Or not sure if it is even possible.

I have 3 questions,

1) Do we must need to use some 3rd Party APIs or Libraries like Ratchet, PHP-Push-WebSocket or PHP WebSocket to enable PHP to communicate over WebSocket protocol?

2) If your answer to above question is yes then what is the advantage/purpose of using Apache's mod_proxy_wstunnel?

3) If I use any PHP WebSocket 3rd Party Library, then do I still need to enable and use Apache's mod_proxy_wstunnel? If No, then again what is the purpose of Apache's mod_proxy_wstunnel?

I went through this Using go-websocket behind Apache mod_proxy_wstunnel. In this question, the OP has indicated some go-websocket but unfortunately the link is giving 404 Error and hence I cannot understand if the user has used any 3rd Party API.

Any help would be highly appreciated. Thanks in advance.

My websocket file:

I have following code

index.php

I developed a multiplayer card game and therefore used a websocket. To implement the websocket in php, I used this library

I'v put it to my ubuntu server and the program works fine on Chrome Browser and in Firefox (The frontend is implemented using Javascript). Using the Edge Browser, there is an error stating "ReferenceError: WebSocket is undefined". But on the internet I have read that Edge should normally support websockets.

I already checked, whether the document mode is another IE version, but it is set to edge as well. The exact version is 11.0.0600.18537.

The following is my code (althoug I don't think that is is a problem with it as it works in the other browsers)

I am running a websockets server using https://github.com/ghedipunk/PHP-Websockets/blob/master/websockets.php on an Ubuntu 16 box with PHP7

After 256 users connect to the websocket, it stops taking connections and I can't figure out why. In the client, I get a 1006 error code (connection was closed abnormally (locally) by the browser implementation) and no further information. The websockets request doesn't appear to make it to the websockets server (which normally echos "Client Connected" right after a socket connection is made).

In the connect() function, one of the things I do is echo the count of the number of users, sockets and overall memory usage to the log. This problem occurs whenever the user count hits 256 (at which point the socket count is 257 and memory usage around 4Mb). The fact that it happens at 256 makes me think that a limit is being hit somewhere, but I can't find that limit. If I restart the websockets server, everything works fine again.

From my investigation so far, I have tried and checked:

• ulimit (says it's unlimited)
• MySQL connection limit (was set to default, now is 1000, but that didn't help)
• Increased the PHP memory limit (because why not, just to see)
• SOMAXCONN is set to 128, so I don't think this is the problem, but I would have to recompile PHP to test it. I haven't tried this yet.
• Apache: The message I get when the problem occurs is: [proxy:error] [pid 16785] (111)Connection refused: AH00957: WS: attempt to connect to 10.0.0.240:9000 (websockets.mydomain.com) failed, which doesn't tell me much about anything. Apache is running MPM prefork and I have increased the spare servers and MaxRequestWorkers

I am open to any suggestions as to where to look next or how to get more detail out of the "Connection Refused" error log from apache!

Thanks