PHP programming Test

Summary of PHP programming test

The Wetest PHP test evaluates how candidates write server-side code, manipulate data, and build dynamic web applications using PHP. Candidates encounter coding challenges that require working with arrays, processing strings, and implementing functions that transform data efficiently.

The test measures proficiency with PHP's built-in array functions including sort() for ordering elements, explode() for parsing strings into arrays, and array_map() for applying transformations across collections. These functions appear constantly in real PHP development, and understanding them separates experienced developers from beginners.

Candidates are evaluated on their ability to write clean, secure code that follows PHP best practices. The goal is to identify developers who can handle everything from simple data processing to complex application logic without introducing bugs or security vulnerabilities.

Covered skills

• PHP syntax and fundamentals
• Arrays and array functions
• Object-oriented PHP
• Database interactions
• PHP frameworks
• Security practices

Use the PHP programming test to hire

This test helps employers evaluate candidates for roles requiring PHP development, from junior developers building features to senior engineers architecting applications.

Backend developers must write server-side logic that processes data, interacts with databases, and responds to client requests. The test reveals whether they can handle form input, work with sessions, and build APIs that return expected results.

Full-stack developers need PHP skills alongside front-end knowledge. This assessment measures their ability to integrate PHP with HTML, handle data flow between database and browser, and write code that scales without becoming unmaintainable.

PHP application developers build and maintain feature-rich web applications. The test evaluates their understanding of object-oriented design, framework conventions, and database interactions that keep applications running smoothly.

Legacy code maintainers work with existing PHP codebases that may not follow modern practices. This assessment shows whether they can read, debug, and safely modify code written by others without introducing regressions.

Technical leads overseeing PHP projects need deep knowledge to guide teams and review code. The test measures their understanding of security practices, performance optimization, and architectural decisions that affect long-term maintainability.

Adding this test to your hiring process provides objective insights into candidates' PHP skills, helping you select developers who can contribute effectively from day one.

Why Choose the Wetest PHP Test

• Real-world coding challenges simulate actual tasks like processing form data, working with arrays, and building database-driven features that PHP developers handle daily.
• Array function evaluation assesses whether candidates understand sort(), explode(), array_map(), and similar functions that appear constantly in real PHP code.
• Database interaction tasks test proper use of PDO or MySQLi with prepared statements, not just whether queries return results.
• Object-oriented design assessment reveals if candidates can structure code using classes and inheritance for applications that remain maintainable as they grow.
• Security-focused scenarios identify developers who understand SQL injection, XSS, and input validation versus those who leave vulnerabilities in their code.
• Expert-designed evaluations are built by senior PHP developers who have spent years building and maintaining production applications across e-commerce, SaaS, and content management systems.

About the PHP programming test

This test was developed by Wetest's internal team of senior PHP developers and technical interviewers with decades of combined experience building and maintaining production applications across e-commerce, SaaS, and content management systems.

Candidates are presented with realistic coding challenges that mirror actual development work, such as processing form input, manipulating arrays with built-in functions, writing database queries using PDO, and implementing object-oriented solutions that scale.

The test measures proficiency across PHP syntax, array manipulation, database interactions, and object-oriented design. It also evaluates understanding of security practices and familiarity with modern PHP frameworks. The goal is to surface developers who write PHP that is not just functional but also secure, maintainable, and aligned with current best practices.

What does the PHP programming test measure?

The PHP test evaluates the specific skills that determine how candidates write server-side code, interact with databases, and build maintainable web applications. Here is what each skill covers:

PHP Syntax and Fundamentals
The test evaluates whether candidates understand PHP's core syntax or simply copy patterns without comprehension. It measures their knowledge of variables, data types, operators, control structures, and superglobals like $_POST and $_SESSION that handle user input and session data.

Candidates are presented with code snippets containing common syntax pitfalls and asked to identify errors or predict output. Evaluators look for accurate use of PHP-specific conventions and understanding of how PHP executes from top to bottom including proper opening and closing tags.

Arrays and Array Functions
The test evaluates how candidates work with PHP's most versatile and frequently used data structure. It measures their ability to use sort() for ordering elements, explode() for parsing strings into arrays, array_map() for applying transformations, and array_filter() for selective processing without writing manual loops.

Candidates are given tasks requiring data manipulation using PHP's built-in array functions. Evaluators look for efficient approaches that leverage native capabilities rather than reinventing them, and understanding of whether functions modify the original array or return a new one.

Object-Oriented PHP
The test evaluates whether candidates understand classes, objects, inheritance, and interfaces in PHP. It measures their ability to model real-world entities, encapsulate behavior with visibility keywords, and design code that remains maintainable as applications grow beyond simple scripts.

Candidates are presented with scenarios requiring class design, method implementation, or inheritance hierarchies. Evaluators look for appropriate use of constructor promotion, type declarations, and separation of concerns that makes code testable and reusable.

Database Interactions
The test evaluates how candidates connect PHP to databases using PDO or MySQLi. It measures whether they use prepared statements to prevent SQL injection, handle connection errors gracefully, and fetch results in formats that match application needs.

Candidates are given tasks requiring database queries with user-supplied values. Evaluators look for proper parameter binding, avoidance of string concatenation for values, and understanding of when to use different fetch modes for single rows versus result sets.

PHP Frameworks
The test evaluates candidates' familiarity with modern PHP frameworks like Laravel or Symfony. It measures understanding of MVC patterns, routing, service containers, and Eloquent or Doctrine basics without assuming all roles require deep framework expertise.

Candidates are presented with framework-style problems or asked to explain how they would structure code following framework conventions. Evaluators look for awareness of common patterns like dependency injection and autoloading rather than memorized syntax.

Security Practices
The test evaluates whether candidates understand PHP security fundamentals or leave applications vulnerable. It measures knowledge of input validation, output escaping, password hashing, and protection against common attacks like SQL injection and cross-site scripting.

Candidates are presented with code containing security flaws and asked to identify and fix them. Evaluators look for proper escaping, validation before processing, and use of password_hash() rather than homemade encryption or plain text storage.

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