Get Custom Fields - Example of the code (PHP)

try {
                // Set the REST API URL
                $restURL = "https://api.enginemailer.com/restapi/subscriber/emsubscriber/getCustomField";
                
                // Initiate the cURL Method with the REST API URL Specified Previously.
                $client = curl_init($restURL);
                
                // Add APIKey into the Headers to be passed in.
                $headers = array(
                                "APIKey : "
                );
                
                // Return the Transfer as String
                curl_setopt($client, CURLOPT_RETURNTRANSFER, true); 
                // Use POST Method
                curl_setopt($client, CURLOPT_HTTPGET, true); 
                // Add Headers for Request
                curl_setopt($client, CURLOPT_HTTPHEADER, $headers);
                // Calls the Rest API
                $curl_response = curl_exec($client);
                
                $curlJson = json_decode($curl_response);
                $jsonData = $curlJson->Result->Data;
                
                foreach($jsonData as $obj){
                         echo "Custom Field Key: " . $obj->customfield_key . "";
                         echo "Custom Field Name: " . $obj->customfield_name . "";
                         echo "Custom Field Type: " . $obj->customfield_type . "";
                         echo "";
                }
                
                curl_close($client);
}
catch (Exception $e)
{
                echo 'Caught exception: ',  $e->getMessage(), "\n";
}

catch (Exception $e)
{
                echo 'Caught exception: ',  $e->getMessage(), "\n";
}