How This Application Works to Fetch Details
1. User Clicks "Fetch"
The browser makes an asynchronous HTTP request (Fetch API) to the local PHP backend endpoint.
2. PHP Opens UDP Socket
LaravelZkteco creates a low-level UDP socket to 192.168.0.201:4370 and executes the ZKTeco handshake command.
3. Binary Unpack & Render
PHP unpacks the binary datagrams into arrays of Users/Logs and renders them cleanly in your browser table.
Flow in Code:
$zk = new LaravelZkteco('192.168.0.201', 4370);
if ($zk->connect()) {
$zk->disableDevice(); // Prevent punch collisions
$attendance = $zk->getAttendance(); // Reads attendance log records
$users = $zk->getUser(); // Reads enrolled users
$zk->enableDevice(); // Resume normal punching
$zk->disconnect(); // Close UDP socket
}