PHP Study Guide 2026
Everything you need to pass the PHP exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 PHP Exam Format at a Glance
📚 PHP Topics to Study (21)
✍️ Sample PHP Questions & Answers
1. What visibility modifier restricts a property or method to the class itself only?
private members are accessible only within the class that defines them, not from subclasses or outside code.
2. What distinguishes a peer-reviewed study in PHP Programming Language literature?
This is fundamental to PHP Programming Language practice. Independent experts in the field evaluated the methodology and conclusions before publication represents the professional standard for research in the PHP certification framework.
3. Which keyword enables one PHP class to inherit from another?
The extends keyword creates an inheritance relationship, giving the child class access to the parent's public and protected members.
4. How should PDO connection errors be caught in PHP?
PDO throws PDOException on connection and query failures when error mode is set to exceptions, which should be caught with try-catch.
5. What does the array_push() function do in PHP?
array_push() appends one or more elements to the end of an array and returns the new count.
6. Which PHP function returns the length of a string?
strlen() returns the number of bytes (characters) in a given string.