A php script to replicate HubSpot properties created on a standard object and add to a custom object. Only creates non-HubSpot default properties on the new object.

script.php

<?php

// PHP SCRIPT TO MOVE PROPERTIES FROM A STANDARD OBJECT TO A CUSOTM OBJECT

// READ ME
// MODIFY THESE VARIABLES BELOW AS YOU SEE FIT (LINES 8-10)
// ALSO MODIFY THE GROUP NAME MAPPINGS BELOW (LINES 53-56)
$authToken = 'ADD_YOUR_TOKEN_HERE';
$standardObject = 'contacts';
$customObjectInternalName = '2-37668321';

$curl = curl_init();

curl_setopt_array($curl, array(
    CURLOPT_URL => "https://api.hubapi.com/crm/v3/properties/$standardObject",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => '',
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 0,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => 'GET',
    CURLOPT_HTTPHEADER => array(
        "Authorization: Bearer $auth_token"
    ),
));

$response = curl_exec($curl);

curl_close($curl);

// Decode JSON into an associative array
$data = json_decode($response, true);

// Check if the data is valid and 'results' exists
if (!isset($data['results']) || !is_array($data['results'])) {
    die("Invalid or unexpected response from the API.");
}

// Filter results where hubspotDefined is not set (unknown) - this removes HubSpot default properties from the standard object you're retrieving properties from
$filteredResults = array_filter($data['results'], function ($result) {
    return !array_key_exists('hubspotDefined', $result);
});

// Remove specified keys - these keys don't need to be used in creation of new properties on the custom object
$keysToRemove = ['modificationMetadata', 'updatedUserId', 'createdUserId', 'displayOrder', 'updatedAt', 'createdAt'];
foreach ($filteredResults as &$result) {
    // Remove specified keys
    foreach ($keysToRemove as $key) {
        unset($result[$key]);
    }

    // REPLACE GROUPNAME VALUES HERE! This is a simple search and replace to map the group names from the standard object to the custom object.
    if (isset($result['groupName']) && $result['groupName'] === 'contactinformation') {
        $result['groupName'] = 'custom_object_information';
    }

}

// Create new JSON with filtered and cleaned results
$filteredJson = json_encode(['results' => array_values($filteredResults)], JSON_PRETTY_PRINT);


// Decode the JSON string into an associative array
$jsonArray = json_decode($filteredJson, true);

// Extract the results array
$results = $jsonArray['results'];

// Initialize a counter
$requestCount = 0;

// Loop through each property and make an API request to add to the custom object
foreach ($results as $property) {
    // Prepare the payload for the API request
    $payload = [
        "name" => $property['name'],
        "label" => $property['label'],
        "type" => $property['type'],
        "fieldType" => $property['fieldType'],
        "groupName" => $property['groupName'],
        "options" => $property['options'],
        "calculated" => $property['calculated'],
        "externalOptions" => $property['externalOptions'],
        "archived" => $property['archived'],
        "hasUniqueValue" => $property['hasUniqueValue'],
        "hidden" => $property['hidden'],
        "formField" => $property['formField']
    ];

    // Convert the payload to JSON
    $jsonPayload = json_encode($payload);

    // Initialize cURL
    $ch = curl_init();
    curl_setopt_array($ch, [
        CURLOPT_URL => "https://api.hubapi.com/crm/v3/properties/$customObjectInternalName",
        CURLOPT_RETURNTRANSFER => true,
	  CURLOPT_ENCODING => '',
	  CURLOPT_MAXREDIRS => 10,
	  CURLOPT_TIMEOUT => 0,
	  CURLOPT_FOLLOWLOCATION => true,
	  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
	  CURLOPT_CUSTOMREQUEST => 'POST',
        CURLOPT_POSTFIELDS => $jsonPayload,
        CURLOPT_HTTPHEADER => [
            "Content-Type: application/json",
            "Authorization: Bearer $authToken"
        ]
    ]);

    // Execute the cURL request
    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    // Close the cURL session
    curl_close($ch);

    // Log the response for debugging
    echo "Response for property '{$property['name']}': HTTP Code $httpCode, Response: $response" . PHP_EOL ."<br><hr><br>";

    // Increment the request counter
    $requestCount++;

    // Pause after every 10 requests to not hit burst limit
    if ($requestCount % 10 === 0) {
        sleep(1);
    }
}
?>