What experience and knowledge should a developer have to work with PHP?

For working with PHP, a developer should have the following knowledge and experience:

• Knowledge of PHP syntax and basic language constructs (variables, functions, classes, namespaces).
• Understanding of working with arrays, strings, and error handling.
• Experience with databases, especially MySQL, including using PDO or MySQLi for secure queries.
• Knowledge of OOP principles in PHP.
• Experience with popular frameworks (e.g., Laravel, Symfony) is a plus.
• Understanding of web development basics: HTTP, sessions, cookies, forms.
• Skills in working with Composer for dependency management.
• Knowledge of web application security fundamentals (SQL injection, XSS, CSRF).

Example of a simple PHP script:

<?php
// Greeting output
$name = "Мир";
echo "Hello, $name!";

For juniors, basic knowledge and the ability to write simple scripts are enough; middle developers should be able to work with frameworks, write more complex logic, and understand application architecture.