What considerations should be taken into account when using complex conditional statements in PHP code, especially for beginners or future reference?

When using complex conditional statements in PHP code, especially for beginners or future reference, it's important to ensure the logic is clear and easy to follow. Break down the conditions into smaller, more manageable parts and use comments to explain the purpose of each part. Additionally, consider using functions or variables to simplify the conditions and make the code more readable.

// Example of using functions to simplify complex conditional statements

function isUserAdmin($userRole) {
    return $userRole === 'admin';
}

function hasPermission($userRole, $requiredRole) {
    return $userRole === $requiredRole;
}

$userRole = 'admin';
$requiredRole = 'admin';

if (isUserAdmin($userRole) && hasPermission($userRole, $requiredRole)) {
    echo 'User has admin role and required permission.';
} else {
    echo 'User does not have admin role or required permission.';
}