How can developers ensure code cleanliness and readability when working with conditional statements in PHP?

Developers can ensure code cleanliness and readability when working with conditional statements in PHP by following best practices such as using clear and descriptive variable names, properly indenting code blocks, and avoiding nested or overly complex conditions. Additionally, breaking down complex conditions into smaller, more manageable parts can help improve code readability.

// Example of clean and readable conditional statements in PHP
$age = 25;

if ($age >= 18 && $age <= 65) {
    echo "You are eligible for the job.";
} else {
    echo "You are not eligible for the job.";
}