The Basics
PHP is a general purpose programming language targeted at creators of web applications. The language can be used in both scripted and object-oriented application design approaches.
Official documentation of PHP is available at on the PHP Group website.
Expansion Pack
Practitioners looking to expand their knowledge of PHP may seek guidance from a number of third-party resources.
Badge Progress
PHP practitioner badges are available at five levels beginning with the newly initiated practitioner and proceeding through the PHP expert capable of mentoring others who are just beginning their learning journey.
Special Achievements
Experts in creating applications using the PHP programming language are encouraged to obtain official validation of their skills.
Zend Certified Engineer
Practitioners wishing to seek official certification of their mastery of PHP should pursue the Zend Certified Engineer, PHP designation. Certified engineers are eligible for a special PHP badge.