Add latency.php

latency.php

@@ -0,0 +1,38 @@
+<?php
+
+function testLatency($host) {
+    $start_time = microtime(true);
+    
+    $output = shell_exec("ping -c 10 $host");
+
+    $end_time = microtime(true);
+    $latency = $end_time - $start_time;
+
+    if ($output !== null) {
+        if (preg_match('/avg\/min\/max = (\d+\.\d+)\/(\d+\.\d+)\/(\d+\.\d+)/', $output, $matches)) {
+            $avg_ping = $matches[1];
+        } else {
+            $avg_ping = 'Unknown';
+        }
+
+        $latency_rounded = round($latency, 2);
+
+        $latency_rounded = number_format($latency_rounded, 2, '.', '');
+
+        $response = [
+            'host' => $host,
+            'latency_ms' => $latency_rounded,
+        ];
+        
+        return json_encode($response, JSON_PRETTY_PRINT);
+    } else {
+        return json_encode([
+            'error' => 'Ping failed',
+        ], JSON_PRETTY_PRINT);
+    }
+}
+
+$client_ip = $_SERVER['REMOTE_ADDR'];
+
+echo testLatency($client_ip);
+?>