Initial Commit

dyndns.php

@@ -0,0 +1,64 @@
+<?php
+
+require_once __DIR__ . "/vendor/autoload.php";
+
+$oDotEnv = new Dotenv\Dotenv(__DIR__);
+$oDotEnv->load();
+
+$sDynIP = gethostbyname(getenv("SUBDOMAIN") . "." . getenv("DOMAIN"));
+$sExternalIP = file_get_contents("http://ipv4.icanhazip.com");
+$sExternalIP = filter_var($sExternalIP, FILTER_SANITIZE_STRING);
+$sExternalIP = trim(preg_replace('/\s+/', '', $sExternalIP));
+
+if ($sDynIP != $sExternalIP) {
+	echo "IP has changed... changing ip from {$sDynIP} to {$sExternalIP}...\n";
+	updateRecord(getenv("DOMAIN"), getenv("SUBDOMAIN"), "A", 60, $sExternalIP, $sDynIP);
+}
+
+function updateRecord($sDomain, $sSubDomain, $sType = "A", $iTTL = 20, $sContent, $sOldIp)
+{
+	try {
+		$oCurl = curl_init();
+		$aData = [
+			"type" => $sType,
+			"name" => $sSubDomain,
+			"content" => $sContent,
+			"ttl" => $iTTL,
+		];
+
+		$oPayload = json_encode($aData);
+
+		curl_setopt_array($oCurl, [
+			CURLOPT_RETURNTRANSFER => true,
+			CURLOPT_URL => getenv("API_BASE_URL") . $sDomain,
+			CURLOPT_HTTPHEADER => [
+				'X-Auth-Username: ' . getenv("API_USER"),
+				'X-Auth-Password: ' . getenv("API_PASS"),
+				'Content-Type: application/json'
+			],
+			CURLOPT_POST => true,
+			CURLOPT_POSTFIELDS => $oPayload,
+			CURLINFO_HEADER_OUT => true,
+		]);
+
+		$oResponse = curl_exec($oCurl);
+		$aResponse = json_decode($oResponse);
+
+		curl_close($oCurl);
+
+		if ($aResponse->message == "ok") {
+			logToFile("Changed IP from {$sOldIp} to {$sContent}!");
+		} else {
+			logToFile("Error: " . serialize($aResponse));
+		}
+	} catch (Exception $e) {
+		logToFile("Exception: " . $e->getMessage());
+	}
+}
+
+function logToFile($sMessage)
+{
+	$file = fopen("log.txt", "a+");
+	fwrite($file, "[" . date("Y-m-d H:i:s") . "] " . $sMessage);
+	fclose($file);
+}