200 Questions | 2.5 Hours | 3 Attempts Each
70 Easy · 70 Hard · 60 Advanced
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3 attempts per question
Detailed explanations
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PHP and MySQL are the dynamic duo that power over 75% of the web. PHP (Hypertext Preprocessor) is the world's most popular server-side scripting language, while MySQL is the most widely used open-source relational database management system. Together, they form the backbone of countless websites and web applications, including WordPress (which powers over 40% of all websites), Facebook (originally built on PHP), Wikipedia, Etsy, Slack, Tumblr, and MailChimp. This powerful combination has been trusted by developers for over two decades, and with modern PHP 8.x and MySQL 8.0, they remain relevant, fast, and secure for building dynamic web applications in 2026 and beyond.
This PHP MySQL quiz online free features 200 meticulously crafted questions: 70 Easy, 70 Hard, and 60 Advanced. Each question includes detailed explanations covering PHP syntax, OOP, arrays, strings, sessions, cookies, file handling, MySQL queries, joins, indexes, normalization, stored procedures, PDO, prepared statements, and modern PHP frameworks like Laravel and Symfony. Whether you're a beginner starting your web development journey or an experienced back-end developer preparing for interviews at companies like WordPress VIP, Automattic, or e-commerce platforms, this quiz will sharpen your PHP and MySQL skills.
Despite the rise of Node.js, Python, and Go, PHP continues to dominate the web. According to W3Techs, PHP is used by 77.5% of all websites with known server-side programming languages. WordPress alone runs on PHP and powers over 40% of the web — that's over 455 million websites. Major platforms built with PHP include Facebook (originally), Wikipedia (the world's largest encyclopedia), Etsy (craft marketplace), Slack (team communication), Tumblr (blogging platform), MailChimp (email marketing), and Canva (design platform). MySQL is the database of choice for these platforms due to its reliability, performance, and ease of use. Together, PHP and MySQL offer the lowest barrier to entry for web development, with extensive documentation, a massive community, and countless learning resources.
Real-world applications built with PHP and MySQL include: WordPress (CMS for 40% of the web), Facebook (social network), Wikipedia (encyclopedia), Slack (team communication), Etsy (marketplace), MailChimp (email marketing), Tumblr (blogging), Canva (design platform), WhatsApp (encrypted messaging backend), and thousands of e-commerce sites running WooCommerce, Magento, OpenCart, and PrestaShop. The PHP ecosystem includes powerful frameworks like Laravel, Symfony, CodeIgniter, Yii, CakePHP, Phalcon, and Laminas (formerly Zend).
Easy Level (Questions 1-70): This section covers fundamental PHP and MySQL concepts that every web developer must master. You'll be tested on PHP syntax (opening/closing tags, echo, print), variables (naming conventions, variable variables, variable scope), data types (string, integer, float, boolean, array, object, NULL, resource), operators (arithmetic, assignment, comparison, logical, bitwise, string, array, conditional/ternary), control structures (if, else, elseif, switch, match expression), loops (while, do-while, for, foreach), functions (defining functions, parameters, return values, variable functions, anonymous functions, arrow functions), arrays (indexed, associative, multidimensional, array functions like count(), is_array(), in_array(), array_push(), array_pop(), array_merge(), array_keys(), array_values(), sort(), rsort()), superglobals ($_GET, $_POST, $_REQUEST, $_SESSION, $_COOKIE, $_SERVER, $_FILES, $_ENV), basic form handling (GET vs POST, form validation, data sanitization), file handling (fopen(), fread(), fwrite(), fclose(), file_get_contents(), file_put_contents()), error handling (die(), trigger_error(), error_log()), include/require statements (include, require, include_once, require_once), and the difference between include and require. For MySQL, you'll learn basic SQL syntax (SELECT, FROM, WHERE, ORDER BY, GROUP BY, HAVING, LIMIT, OFFSET), database design (CREATE DATABASE, USE), table creation (CREATE TABLE, column types: INT, VARCHAR, TEXT, DATE, DATETIME, TIMESTAMP, BOOLEAN, DECIMAL, constraints: PRIMARY KEY, FOREIGN KEY, UNIQUE, NOT NULL, DEFAULT, AUTO_INCREMENT), data manipulation (INSERT, UPDATE, DELETE, REPLACE), basic joins (INNER JOIN, LEFT JOIN, RIGHT JOIN), aggregate functions (COUNT, SUM, AVG, MIN, MAX), and connecting to MySQL with mysqli (mysqli_connect(), mysqli_query(), mysqli_fetch_assoc(), mysqli_fetch_array(), mysqli_num_rows(), mysqli_close()).
Hard Level (Questions 71-140): This section dives deep into intermediate and advanced PHP and MySQL concepts. Topics include object-oriented PHP (classes, objects, properties, methods, visibility: public, protected, private, constructor __construct, destructor __destruct, inheritance, parent::, method overriding, final keyword, abstract classes, interfaces, traits, late static binding), namespaces (namespace, use, alias, global namespace), autoloading (spl_autoload_register, Composer autoloading), magic methods (__construct, __destruct, __get, __set, __isset, __unset, __call, __callStatic, __toString, __invoke, __clone, __sleep, __wakeup), error and exception handling (try-catch-finally, throw, Exception, Throwable, custom exceptions, set_exception_handler, set_error_handler, error_reporting), regular expressions (preg_match, preg_match_all, preg_replace, preg_split, pattern syntax), PHP sessions (session_start(), $_SESSION, session_id, session_regenerate_id, session_destroy), cookies (setcookie(), $_COOKIE), file uploads ($_FILES, move_uploaded_file, file validation), security (SQL injection prevention, XSS prevention, CSRF protection, password hashing with password_hash() and password_verify(), input validation, output escaping, CSRF tokens, HTTPS enforcement), JSON handling (json_encode, json_decode, JSON_PRETTY_PRINT, JSON_UNESCAPED_UNICODE, json_last_error), REST API development (GET, POST, PUT, DELETE, PATCH, routing, request/response handling, authentication, headers), Composer (dependency management, autoloading, require, require-dev, Composer.json, Composer.lock, vendor directory, packagist.org), advanced MySQL queries (subqueries, correlated subqueries, UNION, UNION ALL, INTERSECT, EXCEPT), joins (FULL OUTER JOIN, CROSS JOIN, SELF JOIN, NATURAL JOIN), GROUP BY with HAVING, window functions (ROW_NUMBER, RANK, DENSE_RANK, LEAD, LAG, NTILE, FIRST_VALUE, LAST_VALUE), common table expressions (WITH clause, recursive CTEs), views (CREATE VIEW, DROP VIEW, updatable views), indexes (CREATE INDEX, DROP INDEX, clustered vs non-clustered, composite indexes, covering indexes, full-text indexes, unique indexes), stored procedures (CREATE PROCEDURE, parameters, variables, control flow, cursors, error handling, CALL), triggers (CREATE TRIGGER, BEFORE/AFTER, INSERT/UPDATE/DELETE, NEW/OLD), and transactions (START TRANSACTION, COMMIT, ROLLBACK, SAVEPOINT, ACID properties, isolation levels).
Advanced Level (Questions 141-200): This section challenges experienced developers with cutting-edge PHP and MySQL concepts. Topics include PHP 8+ features (attributes, constructor property promotion, match expression, union types, named arguments, JIT compilation, nullsafe operator ?->, mixed type, str_contains, str_starts_with, str_ends_with, get_debug_type, throw expression, weak maps), modern frameworks (Laravel: Eloquent ORM, Blade templating, Artisan CLI, migrations, seeding, queues, event broadcasting, Laravel Sanctum, Laravel Passport, Laravel Telescope, Laravel Horizon, Laravel Vapor; Symfony: Doctrine ORM, Twig templating, Dependency Injection, Console component, Maker bundle, Security component, Serializer component), design patterns (Singleton, Factory, Abstract Factory, Builder, Prototype, Adapter, Decorator, Proxy, Strategy, Observer, Template Method, Command, Chain of Responsibility, State, Visitor, Iterator, Mediator, Memento), dependency injection and containers (Service Container, DI in Laravel/Symfony), middleware concepts, event sourcing, CQRS (Command Query Responsibility Segregation), microservices architecture, Docker for PHP (Dockerfile, docker-compose, containerization), Kubernetes orchestration, queue systems (Redis, Beanstalkd, Amazon SQS, RabbitMQ), message brokers (Apache Kafka, RabbitMQ), caching (Redis, Memcached, OPcache, APCu), performance optimization (PHP-FPM tuning, Nginx/Apache configuration, opcode caching, query optimization, indexing strategies, database connection pooling), testing (PHPUnit: unit tests, feature tests, test doubles, data providers, assertions; Pest: elegant testing framework; Mockery for mocking; Laravel Dusk for browser testing), profiling (Xdebug, Blackfire.io, Tideways, New Relic), continuous integration (GitHub Actions, GitLab CI, Jenkins, CircleCI), deployment strategies (Laravel Forge, Envoyer, Deployer, Capistrano), server management (Laravel Forge, Plesk, cPanel), cloud platforms (AWS EC2, RDS, S3; Google Cloud Run, Cloud SQL; Microsoft Azure App Service, Azure Database), advanced MySQL optimization (EXPLAIN analysis, slow query log, query profiling, index optimization, query rewriting, partitioning, sharding, replication (master-slave, master-master, group replication), Galera Cluster), NoSQL alternatives (MongoDB, Redis), and GraphQL APIs (Lighthouse for Laravel, API Platform for Symfony).
Our PHP & MySQL quiz features an innovative gamified attempt system that transforms learning into an engaging challenge. Each question allows 3 attempts. Here's how it works: If you answer correctly on your first try, you earn full points and the question is permanently locked — you've demonstrated mastery of that concept. If you answer incorrectly, you get a second chance, and the feedback message provides a subtle hint without giving away the answer. After a second wrong attempt, you receive a more detailed clue that narrows down the possibilities. On the third wrong attempt, the correct answer and a comprehensive explanation are revealed, ensuring you learn from your mistake rather than just moving on. This system encourages thoughtful answers while preventing frustration — you'll never be permanently stuck on any question.
The built-in 2.5-hour countdown timer (150 minutes) creates authentic exam pressure, simulating real technical interviews and PHP certification exams. With 200 questions to answer, you'll need to manage your time effectively — approximately 45 seconds per question. When only 5 minutes remain, a visual warning appears to help you prioritize. If time expires, the quiz automatically ends — but you can always reset and try again with a fresh start. Your progress is automatically saved in your browser's local storage after every answer, so you can close the page and return later — your answers, attempts, and remaining time will be exactly where you left off. This makes the quiz perfect for busy professionals who need to study in short sessions between meetings.
PHP developers are in high demand worldwide, with salaries ranging from $80,000 to $140,000 annually in the US, and senior full-stack developers earning $160,000+ at top companies. PHP & MySQL expertise is essential for:
WordPress Development: Building custom themes, plugins, blocks, and WooCommerce stores for over 455 million websites. WordPress developer roles are abundant and well-paid. E-commerce Development: Building online stores with WooCommerce, Magento (Adobe Commerce), OpenCart, PrestaShop, and Shopify (headless with PHP). Laravel Development: Building modern, scalable web applications using the most popular PHP framework. Symfony Development: Enterprise-level applications for large organizations (Spotify, Dailymotion, BlaBlaCar). CMS Development: Drupal, Joomla, ExpressionEngine, Craft CMS. API Development: Building RESTful and GraphQL APIs for mobile apps and frontend frameworks. SaaS Applications: Building subscription-based software products. Freelancing: PHP developers are among the highest-paid freelancers on Upwork, Toptal, and Fiverr.
PHP has undergone a remarkable renaissance since PHP 7.0 (2015). PHP 7.0 introduced the Zend Engine 3.0, scalar type declarations, return type declarations, spaceship operator (<=>), null coalescing operator (??), anonymous classes, and group use declarations — doubling performance over PHP 5.6. PHP 7.1 added nullable types, void return type, iterable pseudo-type, and support for negative string offsets. PHP 7.2 introduced argument type declarations for object, parameter type widening, and password hashing algorithm improvements. PHP 7.3 added flexible heredoc/nowdoc syntax, array key first/last functions, and improved error messages. PHP 7.4 introduced typed properties (a game-changer), arrow functions (fn() =>), preloading for performance improvements, null coalescing assignment operator (??=), and weak references. PHP 8.0 was a landmark release featuring named arguments, attributes (annotations), constructor property promotion, union types, match expression, nullsafe operator (?->), str_contains, str_starts_with, str_ends_with, JIT (Just-In-Time compilation), and mixed type. PHP 8.1 added enumerations (enums), never return type, read-only properties, first-class callable syntax, intersection types, and array unpacking with string keys. PHP 8.2 added read-only classes, null, true, false stand-alone types, dynamic properties deprecation, and random extension. PHP 8.3 added typed class constants, dynamic class constant fetch, deep-cloning of readonly properties, and improvements to randomizer. PHP 8.4 adds property hooks, asymmetric visibility, new array functions, and more. This quiz tests your knowledge of these modern PHP features — essential for writing clean, secure, and performant PHP code in 2026 and beyond.
MySQL 8.0 (2018) introduced revolutionary features for modern applications. Window Functions (ROW_NUMBER, RANK, DENSE_RANK, LEAD, LAG) enable complex analytics without self-joins. Common Table Expressions (CTEs) with recursive queries simplify hierarchical data. JSON Data Types and JSON functions (JSON_EXTRACT, JSON_TABLE) bridge SQL and NoSQL. Invisible Indexes allow testing index performance without dropping. Descending Indexes optimize sorting in DESC order. Role-Based Security simplifies permission management. Resource Groups allow controlling CPU affinity. Hash Joins improve performance for JOIN operations. Clone Plugin simplifies database cloning. SET PERSIST persists configuration changes. Optimizer Hints provide fine-grained query tuning. Authentication Plugins (caching_sha2_password) improve security. This quiz includes questions on modern MySQL features — essential for database administrators and back-end developers.
Optimizing PHP applications requires understanding several key areas. OPcache stores precompiled script bytecode in shared memory, eliminating parsing and compilation on every request. PHP-FPM (FastCGI Process Manager) manages PHP processes efficiently, with settings for pm.max_children, pm.start_servers, pm.min_spare_servers, pm.max_spare_servers, and pm.max_requests. Opcode Caching reduces CPU usage significantly. Database Query Optimization includes using indexes, avoiding SELECT *, using EXPLAIN to analyze queries, joining only necessary tables, limiting result sets, and using connection pooling. Caching Strategies include OPcache for bytecode, Redis for data caching, Memcached for session storage, and application-level caching. Using Composer Autoloader Optimization (composer dump-autoload --optimize) speeds up class loading. Enable Compression (gzip) reduces network transfer size. Remove Unused Extensions from php.ini. Use FastCGI Cache in Nginx or Apache. This quiz tests your knowledge of PHP optimization — critical for building high-traffic applications.
Security is paramount in web development. SQL Injection Prevention: Always use prepared statements (PDO or MySQLi) instead of string concatenation. XSS Prevention: Use htmlspecialchars() or htmlentities() when outputting user data. CSRF Protection: Use anti-CSRF tokens in forms. Password Security: Use password_hash() with bcrypt or Argon2, and password_verify() for authentication. Session Security: Regenerate session ID after login (session_regenerate_id()), set secure session cookie flags (httponly, samesite, secure), configure session storage. File Upload Security: Validate file types, limit file sizes, store files outside web root when possible, use unique file names, scan for malware. Input Validation: Validate and sanitize all user inputs using filter_var() with appropriate filters (FILTER_VALIDATE_EMAIL, FILTER_VALIDATE_URL, FILTER_SANITIZE_STRING). Error Handling: Disable display_errors in production, log errors to file. Use HTTPS: Enforce SSL/TLS with HSTS headers. This quiz tests your knowledge of PHP security — critical for building secure web applications.
To get the most value from this PHP & MySQL quiz, follow these best practices: 1) Complete all questions sequentially — the difficulty progresses logically from basic syntax to advanced framework concepts. 2) Read every explanation even when you answer correctly — the explanations contain additional insights, code examples, and real-world use cases. 3) Use the question navigator to revisit questions you found challenging. 4) Track your performance using the real-time score and progress indicators. 5) Download your PDF score sheet after completing all 200 questions — it serves as a personalized study guide and certificate of completion. 6) Practice writing code — build a Laravel project, contribute to open-source WordPress plugins, or create a custom PHP framework to reinforce what you learn. 7) Join PHP communities (Laracasts, SymfonyCasts, r/PHP, Stack Overflow, PHP subreddit) to learn from experienced developers.
Whether you're preparing for a back-end developer interview at Automattic (WordPress), building e-commerce stores for clients, creating SaaS applications for startups, freelancing as a PHP developer, or contributing to open-source CMS platforms, mastering PHP and MySQL is an investment that pays dividends throughout your career. PHP's simplicity, MySQL's reliability, and their combined power to build dynamic, data-driven websites make them essential skills for any web developer.
Click START QUIZ now and challenge yourself. With 200 questions covering beginner to expert levels, 3 attempts per question, a 2.5-hour timer, real-time progress tracking, and a downloadable PDF certificate upon completion, you have everything you need to assess, improve, and certify your PHP and MySQL skills. Whether you score 100% or discover areas for improvement, each question brings you one step closer to web development mastery. Good luck, and happy coding!