What technical questions would you like to include in an interview?

For interviews for junior and middle PHP developer positions, it is useful to include questions that test understanding of the language fundamentals and practical skills:

• PHP syntax basics: variables, data types, operators.
• Working with arrays and strings.
• Understanding OOP in PHP: classes, objects, inheritance, interfaces.
• Working with forms and superglobal arrays ($_GET, $_POST, $_SESSION).
• Basics of working with databases via PDO or mysqli.
• Error and exception handling.
• Understanding the lifecycle of an HTTP request and sessions.
• Security basics: protection against SQL injection, XSS.

Example question with code:

// What will the following code output?
$a = [1, 2, 3];
foreach ($a as &$v) {
    $v *= 2;
}
print_r($a);

Answer: the array will be [2, 4, 6].

Such questions help assess basic knowledge and the ability to work with PHP in practice.