ac-php package not working in emacs
<p><br>
I'm trying to installe 
    <code>ac-php</code> <code>emacs</code> package.  I installed it successfully from melpa but can't figure how to use.
Here's the screenshots of what happened. <BR>
Package installed 
<a href="https://i.stack.imgur.com/Gs9Ia.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Gs9Ia.jpg" alt="installed "></a>
<br> Configuration as described in <a href="https://github.com/xcwen/ac-php" rel="nofollow noreferrer">ac-php</a>
<a href="https://i.stack.imgur.com/bkFP3.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bkFP3.jpg" alt="Configuration "></a>
<BR>No option for 
    <code>ac-php-*</code>!
<a href="https://i.stack.imgur.com/SvyX2.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SvyX2.jpg" alt="enter image description here"></a>
<br> 
How to solve it? Please help</p>