CF_DNS_Record_Updater.php

<?php
	
	/*
		Update CloudFlare DNS records via PHP
	*/

	$api_version = 'v4';
	
	if (isset($argv[1]) == false || isset($argv[2]) == false || isset($argv[3]) == false) {
		die('Correct ussage: php CF_DNS_Record_Updater.php <domain> <old_ip> <new_ip>'.PHP_EOL);
	} 
	
	$domain = $argv[1];
	$oldip = $argv[2];
	$newip = $argv[3];
	
	echo 'Domain: '.$domain;
	echo PHP_EOL.'Old IP: '.$oldip;
	echo PHP_EOL.'New IP: '.$newip;
	echo PHP_EOL.'CF API Version: '.$api_version;
	
	echo PHP_EOL.PHP_EOL.'Fetching data...';
	
	$authemail = '<CF Email>';
	$authkey = '<CF Auth Key>';
	$api_uri = 'https://api.cloudflare.com/client/'.$api_version.'/';
	
	$ch = curl_init($api_uri.'zones?page=1&per_page=50&match=all');
	curl_setopt($ch, CURLOPT_HTTPHEADER, array(
		'X-Auth-Email: '.$authemail,
		'X-Auth-Key: '.$authkey,
		'Content-Type: application/json'
	));
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	$response = curl_exec($ch);
	curl_close($ch);

	$r = json_decode($response, true);
	$result = $r['result'];

	echo ' Done'.PHP_EOL;
	
	foreach ($result as $zone) {
		if (isset($zone['id'])) {
			$zoneid   = $zone['id'];
			$zonename = $zone['name'];
			
			if ($zonename != $domain) {
				continue;
			}
			
			echo 'Domain: '.$zonename . ', Zone ID: ' . $zoneid . PHP_EOL;
			echo 'Scanning DNS records...';
			
			$ch = curl_init($api_uri.'zones/'.$zoneid.'/dns_records');
			curl_setopt($ch, CURLOPT_HTTPHEADER, array(
				'X-Auth-Email: '.$authemail,
				'X-Auth-Key: '.$authkey,
				'Content-Type: application/json'
			));
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
			$response = curl_exec($ch);
			curl_close($ch);
			
			$r = json_decode($response, true);
			$dnsrecs = $r['result'];

			echo ' Done'.PHP_EOL.PHP_EOL;
			
			foreach ($dnsrecs as $dns) {
				if (preg_match("/$oldip/", $dns['content'])) {
					$newcontent = preg_replace("/$oldip/", $newip, $dns['content']);
					echo 'Updating DNS record... Name: '.$dns['name'].', Type: '.$dns['type'].', Content: '.$dns['content'].', New Content: '.$newip.'...';

					$dns['content'] = $newcontent;
					updateDNSRecord($dns);
				}
			}
			echo PHP_EOL.'Updated '.$zonename.'\'s DNS records'.PHP_EOL;
			
			echo PHP_EOL;
		}
	}

	function updateDNSRecord($dns) {
		global $authemail, $authkey, $api_uri;

		$ch = curl_init($api_uri.'zones/'.$dns['zone_id'].'/dns_records/'.$dns['id']);
		curl_setopt($ch, CURLOPT_HTTPHEADER, array(
			'X-Auth-Email: '.$authemail,
			'X-Auth-Key: '.$authkey,
			'Content-Type: application/json'
		));

		$data_string = json_encode($dns);

		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
		curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		
		$response = curl_exec($ch);
		curl_close($ch);
		
		$r = json_decode($response, true);

		if ($r['success'] == true) {
			echo ' Success';
		} else {
			echo ' Fail {'.PHP_EOL;
			print_r($r);
			echo '}';
		}
		
		echo PHP_EOL;
	}
	
?>