To become Zend PHP certified, one must take a 70 question, 90 minute exam covering PHP basics, data types, strings, arrays, input/output, functions, object oriented programming, databases, security, and web features. The exam costs $195 and is based on PHP 5.5. To prepare, candidates should study the PHP manual, sample questions, and take practice exams. Hands-on coding experience and memorizing common functions are also recommended. The certification can increase one's professional profile and provides access to networking groups. International recognition demonstrates PHP skills and knowledge.