- This is not done in PHP. It’s part of the
<head>
tags in a HTML page. - That icon is called a favicon. According to Wikipedia:
A favicon (short for favorites icon), also known as a shortcut icon, website icon, URL icon, or bookmark icon is a 16×16 or 32×32 pixel square icon associated with a particular website or webpage.
- Adding it is easy. Just add an
.ico
image file that is either 16×16 pixels or 32×32 pixels. Then, in the web pages, add<link rel="shortcut icon" href="https://stackoverflow.com/questions/11893478/favicon.ico" type="image/x-icon">
to the<head>
element. - You can easily generate favicons here.