zend framework is a collection of 60+ components. they are loosely connected with each other. they can be used as both stand-alone component as well as a group of components working as a single unit.

zend framework provides three most important components, which are −

• zend-servicemanager
• zend-eventmanager and
• zend-modulemanager.

they provide zend components the ability to integrate with other components efficiently.

• event manager − it gives the ability to create event based programming. this helps to create, inject and manage new events.

• service manager − it gives the ability to consume any services (php classes) from anywhere with a little effort.

• module manager − ability to convert a collection of php classes with similar functionality into a single unit called as a module. the newly created modules can be used, maintained and configured as a single unit.

we will cover these concepts in detail in the subsequent chapters.