I need Click2Call For FreePBX

Our grocery site (PHP)
And our contacts FreePBX system (FreePBX On Asterisk\Ver.Firmware: 5.211.65-21) (Service Pack: ) ( support SIP And IAX2 )
I need to create a button on the site click2call when pressed customer contact is contacted by Freepbx pbx system Ext
I need a button on the site and give him No. Ext when the customer presses the button is connecting PBX system?

no . this is module connect via trunk
i need connect via ext to ext sip protocole php

web call back via trunk

click2call ext to ext by sip php