There isn&#39;t native support in terms of there being a standard PHP WebSocket object natively available.

You&#39;ll need to use a library.

The next thing to consider is how the WebSocket server runs. Normally PHP runs in Apache, Nginx (via FastCGI) or on Microsoft IIS (via Fast CGI). With Apache and IIS this may be a problem as it&#39;s not really built with persistent connections such as WebSockets in mind. I&#39;m not sure about Nginx. This is why most PHP WebSocket libraries will be built as standalone libraries to be run as their own processes.

See:

* Apache Module: https://github.com/disconnect/apache-websocket
* Ratchet: https://github.com/cboden/Ratchet
* Wrench: https://github.com/varspool/Wrench
* PHP WebSocket: http://code.google.com/p/phpwebsocket/

*Note: IE10 is now released in Windows 8*

Also see: https://stackoverflow.com/questions/7594425/ajax-push-system/7596103#7596103

Yes, it&#39;s possible to do PHP + Websocket very simply, **without** any third party library (like Ratchet, often mentioned).

This [article](https://medium.com/@cn007b/super-simple-php-websocket-example-ea2cd5893575) is a great lightweight example. (I lost hours with complex solutions, all of them including a few libraries, until I found this useful, simple, article)

You can find more detailed instructions about this here: https://stackoverflow.com/questions/14512182/how-to-create-websockets-server-in-php/65974136#65974136.

It uses a constantly-running PHP server, that you start from command-line with `php websockets.php`, with an event-loop (similar to the Node.JS way). It&#39;s 100% possible to use native PHP functions like `socket_create`, etc.

We are developer, and we have a digital signed application installer. When we install this application, it popups out the smart screen which affects the installing experience. It says 

&gt; **Windows protected your PC**
&gt; 
&gt; Windows SmartScreen prevented an unrecognized app from starting,
&gt; Running this app might put your PC at risk.

I think Microsoft has some strategy to verify the application besides the digital signature. Has anyone has the experience for this issue and please give me some clue to fix this issue?

How to pass the smart screen on Win8 when install a signed application?

I&#39;m trying to set cookies with Go&#39;s net/http package. I have:

    package main

    import &quot;io&quot;
    import &quot;net/http&quot;
    import &quot;time&quot;

    func indexHandler(w http.ResponseWriter, req *http.Request) {
        expire := time.Now().AddDate(0, 0, 1)
        cookie := http.Cookie{&quot;test&quot;, &quot;tcookie&quot;, &quot;/&quot;, &quot;www.domain.com&quot;, expire, expire.Format(time.UnixDate), 86400, true, true, &quot;test=tcookie&quot;, []string{&quot;test=tcookie&quot;}}
        req.AddCookie(&amp;cookie)
        io.WriteString(w, &quot;Hello world!&quot;)
    }

    func main() {
        http.HandleFunc(&quot;/&quot;, indexHandler)
        http.ListenAndServe(&quot;:80&quot;, nil)
    }

I tried googling &#39;Golang&#39; with &#39;cookies&#39;, but didn&#39;t get any good results. If anyone can point me in the right direction it would be greatly appreciated.

Setting cookies with net/http

Looking for Hello World Type Example of Web Sockets Implementation:

Here is [Socket Create][1] reference from php.net but this looks more low level than Web Sockets.

I want to use this Web Sockets as shown here on [caniuse.com][2] which is now implemented in all new major browsers.

A Google search turned up this [Nets.TutsPlus site][3] in which I can use the JavaScript example code...but I need to know how to implement the server-side in PHP not Java, Ruby, or Node.js as in the example.

Is PHP Socket Create relevant?  Does PHP natively support Web Sockets?  I guess just a point in the right direction for PHP implementation would help.

Actually the tutorial has a broken link to phpwebsockets...is this the library one should use?

[Websockets.org][4] has a test application, but no mention of PHP.


  [1]: http://www.php.net/manual/en/function.socket-create.php
  [2]: http://caniuse.com/#search=web%20sockets
  [3]: http://net.tutsplus.com/tutorials/javascript-ajax/start-using-html5-websockets-today/
  [4]: http://www.websocket.org

Is native PHP support for Web Sockets available?

Looking for Hello World Type Example of Web Sockets Implementation:
Here is <a href="http://www.php.net/manual/en/function.socket-create.php" target="_blank" rel="noopener noreferrer">Socket Create</a> reference from php.net but this looks more low level than Web Sockets.
I want to use this Web Sockets as shown here on <a href="http://caniuse.com/#search=web%20sockets" target="_blank" rel="noopener noreferrer">caniuse.com</a> which is now implemented in all new major browsers.
A Google search turned up this <a href="http://net.tutsplus.com/tutorials/javascript-ajax/start-using-html5-websockets-today/" target="_blank" rel="noopener noreferrer">Nets.TutsPlus site</a> in which I can use the JavaScript example code...but I need to know how to implement the server-side in PHP not Java, Ruby, or Node.js as in the example.
Is PHP Socket Create relevant? Does PHP natively support Web Sockets? I guess just a point in the right direction for PHP implementation would help.
Actually the tutorial has a broken link to phpwebsockets...is this the library one should use?
<a href="http://www.websocket.org" target="_blank" rel="noopener noreferrer">Websockets.org</a> has a test application, but no mention of PHP.

When I am trying to use the TWIG `{% javascript %}` tag to link to my `.js` file it return me with the following exception :

    An exception has been thrown during the compilation of a template (&quot;You must add CompetitiongameBundle to the assetic.bundle config to use the {% javascripts %} tag in CompetitiongameBundle:game:index.html.twig.&quot;) in &quot;CompetitiongameBundle:game:index.html.twig&quot;.

 My `index.html.twig` looks like :

    {% javascripts &#39;CompetitiongameBundle/Resources/views/public/js/*&#39;%}
    	&lt;script type=&quot;text/javascript&quot; src=&quot;{{ asset_url }}&quot; &gt;&lt;/script&gt;
    {% endjavascripts %}
    Hello {{ name }}!
    
    &lt;a href=&#39;{{ nexturl }}&#39; &gt;Login&lt;/a&gt;

My Bundle is already present in the config file when I do :
 

    php app/console config:dump-reference assetic

How can I fix this ?

How do I fix &quot;Add myBundle to the asseticBundle config&quot; symfony2 exception?

I need to inject two objects into `ImageService`. One of them is an instance of `Repository/ImageRepository`, which I get like this: 

    $image_repository = $container-&gt;get(&#39;doctrine.odm.mongodb&#39;)
        -&gt;getRepository(&#39;MycompanyMainBundle:Image&#39;);

So how do I declare that in my services.yml? Here is the service:

	namespace Mycompany\MainBundle\Service\Image;

	use Doctrine\ODM\MongoDB\DocumentRepository;

	class ImageManager {
		private $manipulator;
		private $repository;

		public function __construct(ImageManipulatorInterface $manipulator, DocumentRepository $repository) {
			$this-&gt;manipulator = $manipulator;
			$this-&gt;repository = $repository;
		}
	
		public function findAll() {
			return $this-&gt;repository-&gt;findAll();
		}

		public function createThumbnail(ImageInterface $image) {
			return $this-&gt;manipulator-&gt;resize($image-&gt;source(), 300, 200);
		}
	}


How to inject a repository into a service in Symfony?

I would like to exclude these albums, that has name:

    $ban_album_names = array(&#39;Wall&#39;, &#39;Profile&#39;, &#39;Cover&#39;, &#39;Instagram&#39;);

How do I write correctly,

    SELECT * FROM albums WHERE name NOT IN ???

How can I make it look in the array, and if the name matches it should != the row

MySQL where NOT IN name array?

How do you prevent multiple clients from using the same session ID? I&#39;m asking this because I want to add an extra layer of security to prevent session hijacking on my website. If a hacker somehow figures out another user&#39;s session ID and makes requests with that SID, how can I detect that there are different clients sharing a single SID on the server and then reject the hijack attempt?

**EDIT**

I have accepted Gumbo&#39;s answer after careful consideration because I&#39;ve come to the realization that what I&#39;m asking for is impossible due to the restrictions of a *stateless HTTP protocol*. I forgot about what is perhaps the most fundamental principle of HTTP, and now that I think about this question seems a bit trivial.

Let me elaborate what I mean:

After User A logs in on example.com, he is given some random session ID, for simplicity&#39;s sake, let it be &#39;abc123&#39;. This session ID is stored as a cookie on the client side and is validated with a server-side session to ensure the user who logged in remains logged in as he moves from one webpage to another. This cookie of course would not need to exist if HTTP were not stateless. For that reason, if User B steals User A&#39;s SID, and creates a cookie on his computer with the value &#39;abc123&#39;, he would have successfully hijacked User A&#39;s session, but there is simply no way for the server to legitimately recognize that User B&#39;s request is any different from User A&#39;s requests, and therefore the server has no reason to reject any request. Even if we were to list the sessions that were already active on the server and try to see if someone is accessing a session that is already active, how can we determine that it is another user who is accessing the session illegitimately and not the same user who is already logged in with a session ID, but simply trying to make another request with it (ie navigate to a different webpage). We can&#39;t. Checking the user agent? Can be spoofed - but good as a Defense in Depth measure nevertheless. IP Address? Can change for legitimate reasons - but instead of not checking for the IP address at all, I suggest checking something like the first two octets of the IP, as even a user on a data plan network who constantly has a changing IP for perfectly legitimate reasons would only usually have the last two octets of their IP change.

In consclusion, it is the stateless HTTP that condemns us to never being able to fully protect our websites from session hijacking, but good practices (like the ones Gumbo has provided) will be good enough to prevent a good majority of session attacks. Trying to protect sessions from hijacking by denying multiple requests of the same SID is therefore simply ludicrous, and would defeat the whole purpose of sessions.

Preventing session hijacking

I used **python -m SimpleHTTPServer**, but the PHP files don&#39;t execute instead they just been downloaded.

I heard about [WPHP][1] in an old [post][2]. But I don&#39;t know how to use it.
How I can work with it ?


  [1]: http://pythonpaste.org/wphp/
  [2]: https://stackoverflow.com/questions/9900706/simple-python-server-similar-to-simplehttpserver-but-with-php-support

Python SimpleHTTPServer with PHP

I have a simple input field like this.

    &lt;div class=&quot;search&quot;&gt;
       &lt;input type=&quot;text&quot; value=&quot;y u no work&quot;/&gt;
    &lt;/div&gt;​

And I&#39;m trying to `focus()` it inside a function.
So inside of a random function (doesn&#39;t matter what function it is) I have this line …

    $(&#39;.search&#39;).find(&#39;input&#39;).focus();

This works just fine on every Desktop whatsoever.

However it doesn&#39;t work on my iPhone. The field is not getting focused and the keyboard is not shown on my iPhone.

For testing purposes and to show you guys the problem I did a quick sample:

    $(&#39;#some-test-element&#39;).click(function() {
      $(&#39;.search&#39;).find(&#39;input&#39;).focus(); // works well on my iPhone - Keyboard slides in
    });
    
    setTimeout(function() {
      //alert(&#39;test&#39;); //works
      $(&#39;.search&#39;).find(&#39;input&#39;).focus(); // doesn&#39;t work on my iPhone - works on Desktop
    }, 5000);​

Any idea why the `focus()` wouldn&#39;t work with the timeout function on my iPhone.

To see the live example, test this fiddle on your iPhone. http://jsfiddle.net/Hc4sT/

**Update:**

I created the exact same case as I&#39;m currently facing in my current project.

I have a select-box that should — when &quot;changed&quot; — set the focus to the input field and slide-in the kexboard on the iphone or other mobile devices. I found out that the focus() is set correctly but the keyboard doesn&#39;t show up. I need the keyboard to show up.


Mobile Safari: Javascript focus() method on inputfield only works with click?

So I am a newbie in javascript and i had been going through some one else&#39;s code and I found this..  

    describe(&#39;deviceready&#39;, function() {
        it(&#39;should report that it fired&#39;, function() {
            spyOn(app, &#39;report&#39;);
            app.deviceready();
            expect(app.report).toHaveBeenCalledWith(&#39;deviceready&#39;);
        });
    });


What I don&#39;t understand is: 
What exactly does the `describe` keyword do?

info:  
 -  Its a **phonegap** application  
 -  We are using the *spine.js* and *jQuery* libraries  


The &#39;describe&#39; keyword in javascript

I develop plugins for WordPress. It uses some jquery in the user side (themes) as a jquery plugin.
The problem is, when there is an javascript error with other plugins made by other autors, my plugin&#39;s javascript fails to execute.

And the worst thing is people consider that there is a serious fault with my plugin even though it works 100% fine with error handling conditional statements. But it is actually due to some other javascript syntax errors of some other WP plugin/theme authors.

Is there a way to continue execute my plugin JS ignoring other JS errors. Or can i have suggestions to handle this problem ??

![enter image description here][1]


  [1]: http://i.stack.imgur.com/WH3qU.png

Ignore javascript syntax errors in a page and continue executing the script

I&#39;m asking this just for the sake of shaving a few bytes. 

I know I can use `+x` (unary plus) instead of `Number(x)`. Is there a difference between those and `parseFloat`?

What is the difference between Unary Plus/Number(x) and parseFloat(x)?

First, I&#39;m not interested in doing this professionally. I am a web developer, a coworker of mine recently left for Spotify and said he will be working mostly in JavaScript for the Spotify Desktop app. He said it uses &quot;Chrome frame&quot; and everything inside is done like a web app (HTML/JS/CSS).

As a web developer who never built anything for Desktop, this is great news. If I can use the technologies I already know and implement them inside some sort of a &quot;frame&quot; and still be able to build a windows or better yet cross platform app.

I know I didn&#39;t mention anything about the database, but even a simple hello world desktop app with web technologies would be great to get going.

So how does one go about this? Exactly what do I need/need to know?

How to develop Desktop Apps using HTML/CSS/JavaScript?

HTML5 websockets are (and [have been for some time](https://stackoverflow.com/questions/6224771/disadvantages-of-websockets)) a hot topic as they elegantly enable *real-time* [server-side push](http://en.wikipedia.org/wiki/Push_technology#HTTP_server_push).

I currently have a working application with websockets powered by Tomcat 7.0.30 which includes [websocket support](http://www.tomcatexpert.com/blog/2012/05/01/how-apache-tomcat-implemented-websocket). But moving this to a production environment raises questions.

Mainly I would like to know the possible maximum number of connections that can operate (be *open*) concurrently per *browsing session*; a *browsing session* implies a single browser tab or window.

Do open websocket connections add up to the maximum number of connections that can be processed simultaneously by the Web server? E.g. [`MaxClients`](http://httpd.apache.org/docs/2.2/mod/mpm_common.html#maxclients) in Apache.

Conversely, is the maximum number of websockets for a single *browsing session* limited by the browser itself? As this [blog post](http://blog.dennis-boldt.de/?p=177) shows, up to April 2012, different browsers support varying amounts of *open* websocket connections. (I personally would aim for 1 open websocket per *browsing session*; but this info would still be good to know).

**TL/DR:**

 1. What limits the amount of possible websockets *per browsing session*? Is it the client? The server? Or a combination of both?
 2. Does the same limitation(s) apply to both `ws:` and `wss:` connections?

HTML5 websockets: max number of open connections?

I have a question about how to load balance web sockets.

I have a server which supports web sockets. Browsers connect to my site and each one opens a web socket to `www.mydomain.com`. That way, my social network app can push messages to the clients.

Traditionally, using just HTTP requests, I would scale up by adding a second server and a load balancer in front of the two web servers. 

With web sockets, the connection has to be directly with the web server, not the load balancers, because if a machine has a physical limit of say 64k open ports, and the clients were connecting to the load balancer, then I couldn&#39;t support more than 64k concurrent users.

So how do I -

1. get the client to connect directly to the web server (rather than the load balancer) when the page loads? Do I simply load the JavaScript from a node, and the load balancers (or whatever) randomly modifies the URL for the script, every time the page is initially requested?

2. handle a ripple start? The browser will notice that the connection is closed as the web server shuts down. I can write JavaScript code to attempt to reopen the connection, but the node will be gone for a while. So I guess I would have to go back to the load balancer to query the address of the next node to use?

3. I did wonder about the load balancers sending a redirect on the initial request, so that the browser initially requests `www.mydomain.com` and gets redirected to `www34.mydomain.com`. That works quite well, until the node goes down - and sites like Facebook don&#39;t do that. How do they do it?

Loadbalancing web sockets

I have read many posts on SO and the web regarding the keywords in my question title and learned a lot from them. Some of the questions I read are related to specific implementation challenges while others focus on general concepts. I just want to make sure I understood all of the concepts and the reasoning why technology X was invented over technology Y and so on. So here goes:

**Http Polling:** Basically AJAX, using XmlHttpRequest.

**Http Long Polling:** AJAX but the server holds on to the response unless the server has an update, as soon as the server has an update, it sends it and then the client can send another request. Disadvantage is the additional header data that needs to be sent back and forth causing additional overhead.

**Http Streaming:** Similar to long polling but the server responds with a header with &quot;Transfer Encoding: chunked&quot; and hence we do not need to initiate a new request every time the server sends some data (and hence save the additional header overhead). The drawback here is that we have to &quot;understand&quot; and figure out the structure of the data to distinguish between multiple chunks sent by the server.

**Java Applet, Flash, Silverlight:** They provide the ability to connect to socket servers over tcp/ip but since they are plugins, developers don&#39;t want to depend on them.

**WebSockets:** they are the new API which tries to address the short comings of above methods in the following manner:

 - The only advantage of WebSockets over plugins like Java Applets, Flash or Silverlight is that WebSockets are natively built into browsers and does not rely on plugins.
 - The only advantage of WebSockets over http streaming is that you don&#39;t have to make an effort to &quot;understand&quot; and parse the data received.
 - The only advantage of WebSockets over Long Polling is that of elimination of extra headers size &amp; opening and closing of socket connection for request.

Are there any other significant differences that I am missing? I&#39;m sorry if I am re-asking or combining many of the questions already on SO into a single question, but I just want to make perfect sense out of all the info that is out there on SO and the web regarding these concepts.

Thanks!

My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets

I&#39;m assuming that WebRTC is an API that decodes/encodes audio and video, although the communication between the server and the clients is done via web sockets, or some other network protocol? I&#39;m a bit confused. Does WebRTC have its own communications protocol?

WebRTC and Websockets. Is there a difference

HTML5 websockets currently use a form of TCP communication. However, for real-time games, TCP just won&#39;t cut it (and is great reason to use some other platform, like native). As I probably need UDP to continue a project, I&#39;d like to know if the specs for HTML6 or whatever will support UDP?


Also, are there any reliable benchmarks for WebSockets that would compare the WS protocol to a  low-level, direct socket protocol?

Content Type	Original Author	Original Content on Stackoverflow
Question	user656925	View Question on Stackoverflow
Solution 1 - Php	leggetter	View Answer on Stackoverflow
Solution 2 - Php	Basj	View Answer on Stackoverflow

Is native PHP support for Web Sockets available?

Php Problem Overview

Php Solutions

Solution 1 - Php

Solution 2 - Php

Setting cookies with net/http

How to pass the smart screen on Win8 when install a signed application?

Attributions