Is posible integrate jsreport to web site developed in PHP?
I have developed a web site in PHP and AngularJS is posible use jsreport for generate PDF files with information of database
It is possible, but you will need to take your time and study jsreport a bit and come back here with more specific questions.
You can start with get started article, startup jsreport server and use rest API to render the report.
You can also download and try to integrate recently released jsreport single executable into your solution, if you don't want to start another server