Google Ads Webhook.php

<?php

  // Comment out this variable when you are ready to use this webhook:
  $Google_data = '{
    "lead_id": "NDAwMDAwMDAwMDA6bGVhZF9pZDoxNTg4OTgxNjA1ODIw",
    "user_column_data": [{
        "column_name": "User Phone",
        "string_value": "+16505550123",
        "column_id": "PHONE_NUMBER"
      },
      {
        "column_name": "User Email",
        "string_value": "test@example.com",
        "column_id": "EMAIL"
      },
      {
        "column_name": "Postal Code",
        "string_value": "94043",
        "column_id": "POSTAL_CODE"
      },
      {
        "column_name": "First Name",
        "string_value": "FirstName",
        "column_id": "FIRST_NAME"
      },
      {
        "column_name": "Last Name",
        "string_value": "LastName",
        "column_id": "LAST_NAME"
      }
    ],
    "api_version": "1.0",
    "form_id": 40000000000,
    "campaign_id": 7581129110,
    "google_key": "12345",
    "is_test": true,
    "gcl_id": "123abc456def",
    "adgroup_id": 20000000000,
    "creative_id": 30000000000
  }';

  // Uncomment next line when you are ready to use this webhook:
  // $Google_data = file_get_contents("php://input");
  $data = json_decode($Google_data, true);

  function loopAllData($data) {
    foreach ($data as $key => $value) {
      if (!is_array($value)) {
        $results .= $key . ": " . $value . "<br>\r\n";
      }
      if (is_array($value)) {
        $results .= loopAllData($value);
      }
    }
    return $results;
  }

  // You set this in Google Ads, just under where you put the webhook URL
  $pass="12345";

  if ( $pass == $data["google_key"]) {

    $lead_id = $data['lead_id'];
    $api_version = $data['api_version'];
    $form_id = $data['form_id'];
    $campaign_id = $data['campaign_id'];
    // $google_key = $data['google_key'];
    // $is_test = $data['is_test'];
    // $gcl_id = $data['gcl_id'];
    // $adgroup_id = $data['adgroup_id'];
    // $creative_id = $data['creative_id'];
    $body_data = loopAllData($data['user_column_data']);

    $bodyemail = "<br>Campaign ID: {$campaign_id}<br>\r\n";
    $bodyemail .= "lead ID: {$lead_id}<br>\r\n";
    $bodyemail .= "Form ID: {$form_id}<br>\r\n";
    $bodyemail .= $body_data;
    $bodyemail .= "API Version: {$api_version}<br>\r\n";

    // Change with your emails
    $emailfrom = "webhooks@email.com";
    $emailto = "your@email.com";
    $subject = "Brand - Google Ads - Lead form extension";
    $headers = "From: {$emailfrom}\r\n";
    $headers .= "Reply-To: {$emailfrom}\r\n"; //Optional
    $headers .= "MIME-Version: 1.0\r\n";
    $headers .= "Content-Type: text/html; charset=utf-8\r\n";

    // Uncomment next line when you are ready to use this webhook
    // mail($emailto, $subject, $bodyemail, $headers);

    // Comment out next line when you are ready to use this webhook
    print_r($emailto. $subject. $bodyemail. $headers);

  }
?>

Requires php mail() to be working... would be better if using SMTP with PHPmailer.