What are some efficient SQL queries that can be used to track and enforce daily email sending limits in PHP?
To track and enforce daily email sending limits in PHP, you can use SQL queries to keep track of the number of emails sent each day by a user and enforce a limit on the number of emails they can send. One efficient way to do this is to have a table in your database that logs each email sent, including the user who sent it and the timestamp. You can then query this table to count the number of emails sent by a user on a particular day and enforce a limit by checking this count before sending each email.
// Check if user has reached daily email sending limit
$user_id = 123; // User ID of the user sending the email
$email_limit = 100; // Daily email sending limit
// Connect to your database
$pdo = new PDO("mysql:host=localhost;dbname=your_database", "username", "password");
// Count the number of emails sent by the user today
$stmt = $pdo->prepare("SELECT COUNT(*) FROM email_logs WHERE user_id = :user_id AND DATE(timestamp) = CURDATE()");
$stmt->bindParam(':user_id', $user_id);
$stmt->execute();
$email_count = $stmt->fetchColumn();
// Check if user has reached the daily email sending limit
if ($email_count >= $email_limit) {
echo "You have reached your daily email sending limit.";
exit;
}
// If user has not reached the limit, proceed with sending the email
// Your code to send the email goes here
// Log the email sent in the database
$stmt = $pdo->prepare("INSERT INTO email_logs (user_id, timestamp) VALUES (:user_id, NOW())");
$stmt->bindParam(':user_id', $user_id);
$stmt->execute();