 1. This is not done in PHP. It&#39;s part of the `&lt;head&gt;` tags in a HTML page.
 2. That icon is called a favicon. According to Wikipedia:
&gt;A favicon (short for favorites icon), also known as a shortcut icon, website icon, URL icon, or bookmark icon is a 16&#215;16 or 32&#215;32 pixel square icon associated with a particular website or webpage.
 3. Adding it is easy. Just add an `.ico` image file that is either 16x16 pixels or 32x32 pixels. Then, in the web pages, add `&lt;link rel=&quot;shortcut icon&quot; href=&quot;favicon.ico&quot; type=&quot;image/x-icon&quot;&gt;` to the `&lt;head&gt;` element.
 4. You can easily generate favicons [here](http://www.favicon.cc/).

Simply put a file named `favicon.ico` in the webroot.

If you want to know more, please start reading:

 - [Favicon on Wikipedia](http://en.wikipedia.org/wiki/Favicon)
 - [Favicon Generator][1]
 - [How to add a Favicon by W3C][2] (from 2005 though)


  [1]: http://www.favicon.cc/
  [2]: http://www.w3.org/2005/10/howto-favicon

We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to believe.

Let me be more specific about the test. We have a program that runs two threads. The first thread gets the current time (in ticks using RDTSC) and then signals a condition variable once a second. The second thread waits on the condition variable and wakes up when it is signaled. It then gets the current time (in ticks using RDTSC). The difference between the time in the second thread and the time in the first thread is computed and displayed on the console. After this the second thread waits on the condition variable once more. It will be signaled again by the first thread after about a second passes. 

So, in a nutshell we get a *thread to thread communication via condition variable* latency measurement once a second as a result.

In kernel 2.6.32, this latency is somewhere on the order of 2.8-3.5 us, which is reasonable. In kernel 3.2.0, this latency has increased to somewhere on the order of 40-100 us. I have excluded any differences in hardware between the two hosts. They run on identical hardware (dual socket X5687 {Westmere-EP} processors running at 3.6 GHz with hyperthreading, speedstep and all C states turned off). The test app changes the affinity of the threads to run them on independent physical cores of the same socket (i.e., the first thread is run on Core 0 and the second thread is run on Core 1), so there is no bouncing of threads on cores or bouncing/communication between sockets.

The only difference between the two hosts is that one is running Ubuntu 10.04 LTS with kernel 2.6.32-28 (the fast context switch box) and the other is running the latest Ubuntu 12.04 LTS with kernel 3.2.0-23 (the slow context switch box). All BIOS settings and hardware are identical.

Have there been any changes in the kernel that could account for this ridiculous slow down in how long it takes for a thread to be scheduled to run?

**Update:**
If you would like to run the test on your host and linux build, I have [posted the code to pastebin] for your perusal. Compile with:

    g++ -O3 -o test_latency test_latency.cpp -lpthread

Run with (assuming you have at least a dual-core box):

    ./test_latency 0 1 # Thread 1 on Core 0 and Thread 2 on Core 1

[posted the code to pastebin]: http://pastebin.com/3sx8Vhf1

**Update 2**:
After much searching through kernel parameters, posts on kernel changes and personal research, I have figured out what the problem is and have posted the solution as an answer to this question.


Context switches much slower in new linux kernels

I have this definition:

    {
        &quot;repositories&quot;: [
            {
                &quot;type&quot;: &quot;package&quot;,
                &quot;package&quot;: {
                    &quot;name&quot;: &quot;symfony/sfGuardPlugin&quot;,
                    &quot;version&quot;: &quot;4.0.2&quot;,
                    &quot;dist&quot;: {
                        &quot;url&quot;: &quot;http://plugins.symfony-project.org/get/sfGuardPlugin/sfGuardPlugin-4.0.2.tgz&quot;,
                        &quot;type&quot;: &quot;tar&quot;
                    }
                }
            }
        ],
        &quot;require&quot;: {
            &quot;symfony/sfGuardPlugin&quot;: &quot;4.0.*&quot;
        }
    }

I am using Symfony 1, and I&#39;d like to install them on `plugins/sfGuardPlugin/`. How do I specify this?

How to specify Composer install path?

&gt; **Possible Duplicate:**  
&gt; [HTML Title Image](https://stackoverflow.com/questions/3103490/html-title-image)  

&lt;!-- End of automatically inserted text --&gt;

Can someone please tell me how to make icons appear on browser tabs in PHP? 

I want my icon to appear on the tabs when my site is being accessed.

Add Favicon to Website

> Possible Duplicate: 
> <a href="https://stackoverflow.com/questions/3103490/html-title-image" target="_blank" rel="noopener noreferrer">HTML Title Image</a>

Can someone please tell me how to make icons appear on browser tabs in PHP?
I want my icon to appear on the tabs when my site is being accessed.

Currently I have a paragraph heading and an image to its right, on the same line:

    &lt;div class=&quot;paragraphs&quot;&gt;
      &lt;div class=&quot;row&quot;&gt;
        &lt;div class=&quot;span4&quot;&gt;
          &lt;div class=&quot;content-heading&quot;&gt;&lt;h3&gt;Experience &amp;nbsp &lt;/h3&gt;&lt;img src=&quot;../site/img/success32.png&quot;/&gt;&lt;/div&gt;
          &lt;p&gt;Donec id elit non mi porta gravida at eget metus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui.&lt;/p&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;

This works fine - the content-heading and the image are on the same line. However, when I put the image before the content-heading div, they are no longer on the same line. This is what I want to achieve - image then content-heading - on the same line.

Align image to left of text on same line - Twitter Bootstrap3

This is the usual SVG mime type:

    image/svg+xml
And it works great. However, when embedding an SVG font, chrome tells you the mime type is incorrect, obviously because you return a font instead of an image.

Is there any universal mime type? is chrome wrong? is `application/svg+xml` accepted somehow?

I guess this is still a gray area in HTML5 but someone here might know.

Right mime type for SVG images with fonts embedded

Is it possible for the child of a div set to `pointer-events: none` to have pointer events?


I need the div that holds another div to allow pointer events to pass through, but for the div itself to still have events. 

Is this possible?

Is it possible for the child of a div set to pointer-events: none to have pointer events?

Consider this [JSFiddle][1]. It works fine in Firefox (14.0.1), but fails in Chrome (21.0.1180.75), Safari (?) and Opera(12.01?) on both Windows (7) and OS X (10.8). As far as I can tell the issue is with either the `setData()` or `getData()` methods on the `dataTransfer` object. Here&#39;s the relevant code from the JSFiddle.

    var dragStartHandler = function (e) {
        e.originalEvent.dataTransfer.effectAllowed = &quot;move&quot;;
        e.originalEvent.dataTransfer.setData(&quot;text/plain&quot;, this.id);
    };
    
    var dragEnterHandler = function (e) {
        //  dataTransferValue is a global variable declared higher up.
        //  No, I don&#39;t want to hear about why global variables are evil,
        //  that&#39;s not my issue.
        dataTransferValue = e.originalEvent.dataTransfer.getData(&quot;text/plain&quot;);
        
        console.log(dataTransferValue);
    };

As far as I can tell this should work perfectly fine and if you look at the console while dragging an item you will see the id written out, which means that it&#39;s finding the element just fine and grabbing it&#39;s id attribute. The question is, is it just not setting the data or not getting the data?

I&#39;d appreciate suggestions because after a week of working on this with three attempts and some 200+ versions, I&#39;m starting to loose my mind. All I know is it used to work back in version 60 or so and that specific code hasn&#39;t changed at all...

&lt;s&gt;Actually, one of the major differences between 6X and 124 is that I changed the event binding from `live()` to `on()`. I don&#39;t think that&#39;s the issue, but I&#39;ve come to see a couple failures from Chrome when it comes to DnD while working on this.&lt;/s&gt; This has been debunked. The event binding method has no effect on the issue.

**UPDATE**

I&#39;ve created a new [JSFiddle][2] that strips out absolutely everything and just leaves the event binding and handlers. I tested it with jQuery 1.7.2 and 1.8 with both `on()` and `live()`. The issue persisted so I dropped down a level and removed all frameworks and used pure JavaScript. The issue *still* persisted, so based on my testing it&#39;s not my code that&#39;s failing. Instead it appears that Chrome, Safari and Opera are all implementing either `setData()` or `getData()` off spec or just failing for some reason or another. Please correct me if I&#39;m wrong.

Anyway, if you take a look at the new JSFiddle you should be able to replicate the issue, just look at the console when you&#39;re dragging over an element designated to accept a drop. I&#39;ve gone ahead and opened a ticket with [Chromium][3]. In the end I may still be doing something wrong, but I simply don&#39;t know how else to do DnD at this point. The new JSFiddle is as stripped down as it can get...


  [1]: http://jsfiddle.net/MtypZ/124/
  [2]: http://jsfiddle.net/VzXqK/2/
  [3]: http://code.google.com/p/chromium/issues/detail?id=142508

HTML5 DnD dataTransfer setData or getData not working in every browser except Firefox

I have this element:

    &lt;div style=&quot;width: 100%; height: 10px;&quot;&gt;&lt;/div&gt;

I want to get it&#39;s width in pixels. I just tried this:

    document.getElementById(&#39;banner-contenedor&#39;).style.width

Which returns `100%`. Is it possible to actually get the element&#39;s width in pixels with JavaScript?

Get width in pixels from element with style set with %?

The [WHATWG document](http://www.whatwg.org/specs/web-apps/current-work/multipage/links.html#attr-hyperlink-rel) for HTML5 says that the `rel` attribute must contain values that are space-separated, and then it gives a table of allowed values.

&gt; The attribute&#39;s value must be a set of space-separated tokens. The [allowed keywords and their meanings](http://www.whatwg.org/specs/web-apps/current-work/multipage/links.html#linkTypes)...

The list of allowed keywords for the `link` element does not include `shortcut`, but it does include `icon`. So I&#39;m looking at the all-too-well-known tag

    &lt;link rel=&quot;shortcut icon&quot; href=&quot;/favicon.ico&quot; /&gt;

and wondering if it is HTML5-compliant. Should I remove the keyword `shortcut` from this tag throughout my Website?

HTML5 `&lt;link rel=&quot;shortcut icon&quot; /&gt;`

I am making a HTML page and one of the things I wanted was a favicon appearing next to the title.

I&#39;m using Google Chrome, I see favicons working on other websites, but the favicon on my website won&#39;t show up.  The site is in a folder on my desktop named site.

The `favicon.ico` file is 16x16, and I used an online generator to make it.

This is the code: 

    &lt;!DOCTYPE html&gt;
    &lt;html&gt; 
        &lt;head&gt;
            &lt;title&gt;&lt;/title&gt;
            &lt;link rel=&quot;shortcut icon&quot; href=&quot;/favicon.ico&quot; /&gt;
        &lt;/head&gt;
        &lt;body&gt;
        &lt;/body&gt;
    &lt;/html&gt;

 

HTML Favicon.ico won&#39;t show on Google Chrome

According to the **Internet Assigned Numbers Authority** (IANA), all .ico file falls under the MIME type `image/vnd.microsoft.icon`. ([Source][1])

E.g.
`&lt;link rel=&quot;icon&quot; type=&quot;image/vnd.microsoft.icon&quot; href=&quot;favicon.ico&quot; /&gt;`

However, savvy internet guru, **Paul Irish**, claims this is wrong, and that it would actually be `image/x-icon`. ([Source][2])

E.g.
`&lt;link rel=&quot;icon&quot; type=&quot;image/x-icon&quot; href=&quot;favicon.ico&quot; /&gt;`

I know you can get away with not including a &quot;type&quot; for .ico files, but if you were going to include one, which should it be? Are there actually any problems with serving it as official IANA type?


  [1]: http://www.iana.org/assignments/media-types/image/vnd.microsoft.icon
  [2]: https://github.com/paulirish/html5-boilerplate/commit/37b5fec090d00f38de64b591bcddcb205aadf8ee

Correct MIME Type for favicon.ico?

I recently started working in Node.js and in the app.js file there is this line:

    app.use(express.favicon());

Now, how do I set up my own custom favicon.ico?

How to set custom favicon in Express?

How do I add image in title bar?

I have title- &quot;Webnet&quot; 

Merging it with a FontAwesome Glyphicon&#39;s icon images as-

    &lt;title&gt;&lt;i class=&quot;icon-user icon-black&quot;&gt;&lt;/i&gt;Webnet&lt;/title&gt;

And I tried it replacing with image source-

    &lt;title&gt;&lt;img src=&quot;assests/img/user-Hermosillo.png&quot; &gt;&lt;/img&gt;Webnet&lt;/title&gt;

But title shows innerHTML instead of showing image there.

Any help?


Content Type	Original Author	Original Content on Stackoverflow
Question	osg	View Question on Stackoverflow
Solution 1 - Html	citruspi	View Answer on Stackoverflow
Solution 2 - Html	kapa	View Answer on Stackoverflow

Add Favicon to Website

Html Problem Overview

Html Solutions

Solution 1 - Html

Solution 2 - Html

How to specify Composer install path?

Context switches much slower in new linux kernels

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