title: Get Unique web browser ID in PHP
body: <p>I am looking a way to store unique ID of web browsers in <code>PHP</code>? I searched everywhere..but couldn't find any useful things. First of all, does web browsers have a unique ID or something like that to identify them??? Like the computers have a unique IP address, does browsers have anything like that?? I am trying this so that I can store user details into my database. So, we can find out a user used which browser to access my <code>PHP</code> website. Can I store such an ID to a <code>php</code> variable?</p>
  
  <p>for example, <code>$x= ID</code> of the web browser.</p>