cloudflare_batch.php

<?php
// Form a list of all CF IP zones 
// For each zone, grab all A records and TXT records matching $oldip
// For each matching record, update it to the new IP address
	
// Does not deal with paginated zone results so there's currently
// a maximum of 50 zones managed by this tool

$authemail = "user@example.com";
$authkey   = "";
	
// Old IP address to find
$oldip     = "xxx.xxx.xxx.xxx";

// New IP address to replace the old one with
$newip     = "xxx.xxx.xxx.xxx";

$ch = curl_init("https://api.cloudflare.com/client/v4/zones?page=1&per_page=50&match=all");
    curl_setopt($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'];

$count = 1;
foreach ($result as $zone)
{
    if (isset($zone['id']))
    {
        $zoneid   = $zone['id'];
        $zonename = $zone['name'];
        echo $count . ": " . $zonename . " " . $zoneid . "<br />\n";
	$count++;

        // List all DNS records for this domain
        $ch = curl_init("https://api.cloudflare.com/client/v4/zones/$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'];

        foreach ($dnsrecs as $dns)
        {
            if (preg_match("/$oldip/", $dns['content']))
            {
                // OK! Change this DNS record.
                $newcontent = preg_replace("/$oldip/", $newip, $dns['content']);
                echo "oldcontent: " . $dns['content'];
                echo "newcontent: $newcontent<br />\n";

                // Swap the content then
                $dns['content'] = $newcontent;
                updateDNSRecord($dns);
            }
        }
        echo "<br />\n";
    }
}

function updateDNSRecord($dns)
{
    global $authemail, $authkey;
    $ch = curl_init("https://api.cloudflare.com/client/v4/zones/".$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);
    echo "JSON_DATA_STRING: $data_string";
    echo "<br />\n";

    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);

    print_r($r);
    print "<br />\n";
}
?>