What are some best practices for writing clean and error-free PHP code?

To write clean and error-free PHP code, it is important to follow best practices such as using proper indentation, meaningful variable names, commenting code, and avoiding unnecessary code duplication. Additionally, using error handling techniques such as try-catch blocks and validating user input can help prevent errors in your code. 

// Example of clean and error-free PHP code
try {
    // Validate user input
    $username = $_POST['username'] ?? '';
    if(empty($username)) {
        throw new Exception('Username is required');
    }

    // Process the input
    echo 'Hello, ' . $username;
} catch(Exception $e) {
    echo 'Error: ' . $e->getMessage();
}

Keywords

syntax debugging code review security performance

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