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function mymail_admin_page() global $wpdb; $table = $wpdb->prefix . 'mymail_subscribers'; $subscribers = $wpdb->get_results("SELECT * FROM $table WHERE status=1");

$table = $wpdb->prefix . 'mymail_subscribers'; $wpdb->replace($table, [ 'email' => $email, 'name' => $name, 'status' => 1 ]);

// Create newsletter table on theme activation function mymail_create_table() global $wpdb; $table_name = $wpdb->prefix . 'mymail_subscribers'; $charset_collate = $wpdb->get_charset_collate(); $sql = "CREATE TABLE $table_name ( id mediumint(9) NOT NULL AUTO_INCREMENT, email varchar(100) NOT NULL, name varchar(100) DEFAULT '', status tinyint(1) DEFAULT 1, subscribed_at datetime DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id), UNIQUE KEY email (email) ) $charset_collate;";

add_shortcode('mymail_form', 'mymail_subscription_form'); // Process subscription function mymail_handle_subscription() if (isset($_POST['mymail_subscribe']) && wp_verify_nonce($_POST['mymail_nonce'], 'mymail_subscribe_action')) global $wpdb; $email = sanitize_email($_POST['mymail_email']); $name = sanitize_text_field($_POST['mymail_name']); if (!is_email($email)) echo '<p>Invalid email address.</p>'; return;