Question about executing a script on another domain php?

We have a what's called a postback file that sends conversions back to Facebook and other advertising networks. However, I want a postback to be sent to Facebook, but I don't want them to know the domain that is sending the postback. I have a file on www.secretdomain.com/postback.php. I then have the Facebook conversion pixel on www.facebookpixel.com/postback.php.

What's the best way to include the file from www.facebookpixel.com/postback.php into our www.secretdomain.com/postback.php? So when the conversion is sent back Facebook will think it's the www.facebookpixel.com/postback.php sent it in vs our secret domain?

I was thinking adding PHP fopen ? Or would this not work?

fopen will be difficult, because while it can send a HTTP request, setting headers/referrals et al can be problematic.

The simplest solution would be to use cURL

Here's a basic implementation of a Pixel Proxy - of course please test it thoroughly


This will

- Grab the pixel parameters (transaction_id=123)
- Make a cURL request to facebookpixel.com
- Forward those same parameters
- Make it look like it came from facebookpixel.com

BlogPro said:

fopen will be difficult, because while it can send a HTTP request, setting headers/referrals et al can be problematic.

The simplest solution would be to use cURL

Here's a basic implementation of a Pixel Proxy - of course please test it thoroughly

PHP:

<?php
// This is the script that lives on secretdomain.com/postback.php

// 1. Initialize cURL
$ch = curl_init();

// 2. Get all parameters from the conversion
// For example, if conversion sends: secretdomain.com/postback.php?transaction_id=123&amount=50
$query = http_build_query($_GET);  // This captures ALL parameters automatically

// 3. Setup the cURL request to facebookpixel.com
curl_setopt($ch, CURLOPT_URL, 'http://www.facebookpixel.com/postback.php?' . $query);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_REFERER, 'http://www.facebookpixel.com');  // Makes it look like it came from facebookpixel.com

// 4. Execute the request
$response = curl_exec($ch);

// 5. Output the response
echo $response;

// 6. Close cURL
curl_close($ch);
?>

This will

- Grab the pixel parameters (transaction_id=123)
- Make a cURL request to facebookpixel.com
- Forward those same parameters
- Make it look like it came from facebookpixel.com

Click to expand...

Thanks, I was thinking curl too. However, I don't think the $query will be necessary, but thanks for letting me know. As we won't be passing anything. We just need the basic facebook pixel to execute, but making sure it says it came from facebookpixel.com. Hopefully this works. I tried sharing the Facebook pixel below, but it would not let me for some reason.

superaff1984 said:

Thanks, I was thinking curl too. However, I don't think the $query will be necessary, but thanks for letting me know. As we won't be passing anything. We just need the basic facebook pixel to execute, but making sure it says it came from facebookpixel.com. Hopefully this works. I tried sharing the Facebook pixel below, but it would not let me for some reason.

Click to expand...

Of course, the $query is there for when you have params being posted to the postback.

Let me know how it works or if you need anymore help.

BlogPro said:

Of course, the $query is there for when you have params being posted to the postback.

Let me know how it works or if you need anymore help.

Click to expand...

I tried this code, it's returning to Facebook, but it's returning our domain we want to hide.

You can use PHP to send the request from www.secretdomain.com/postback.php to www.facebookpixel.com/postback.php using file_get_contents() or cURL. However, to ensure that Facebook believes it's from www.facebookpixel.com, you would need to set the Referer header in the request to match the Facebook pixel URL.