What are the best practices for updating user ranks in a PHP forum based on post count?

Issue: Updating user ranks in a PHP forum based on post count requires a system that automatically adjusts a user's rank as they reach certain post count milestones. This can be achieved by regularly checking each user's post count and updating their rank accordingly. PHP Code Snippet:

// Assuming $userPostCount is the variable that holds the user's current post count
// Assuming $userRank is the variable that holds the user's current rank

// Define post count milestones and corresponding ranks
$postCountRanks = array(
    10 => 'Junior Member',
    50 => 'Member',
    100 => 'Senior Member'
);

// Check if user has reached a post count milestone and update their rank
foreach ($postCountRanks as $milestone => $rank) {
    if ($userPostCount >= $milestone && $userRank != $rank) {
        $userRank = $rank;
        // Update user's rank in the database or wherever it is stored
        // Example: $user->update(['rank' => $rank]);
    }
}