Can php source code package a library like the java .jar?

I package my source code in Java using .jar. Is there any things like that in php?? Thank you.

What is the difference between jar and package?

A package is a mechanism in Java for organizing classes into namespaces. A jar is a Java ARchive, a file that aggregates multiple Java classes into one.

Can we use PHP with Java?

There are two possible ways to bridge PHP and Java: you can either integrate PHP into a Java Servlet environment, which is the more stable and efficient solution, or integrate Java support into PHP. The former is provided by a SAPI module that interfaces with the Servlet server, the latter by this Java extension.

The closest thing PHP is Phar: http://php.net/manual/en/book.phar.php