function do_payment ($post_values)
{
        $post_url = "https://test.authorize.net/gateway/transact.dll";	  
        // This section takes the input fields and converts them to the proper format	$post_string = "";	foreach( $post_values as $key => $value )	{ $post_string .= "$key=" . urlencode( $value ) . "&"; }	   $post_string = rtrim( $post_string, "& " );	// This sample code uses the CURL library for php to establish a connection,	// submit the post, and record the response.	// If you receive an error, you may want to ensure that you have the curl	// library enabled in your php configuration	$request = curl_init($post_url); // initiate curl object	curl_setopt($request, CURLOPT_HEADER, 0); // set to 0 to eliminate header info from response	curl_setopt($request, CURLOPT_RETURNTRANSFER, 1); // Returns response data instead of TRUE(1)	curl_setopt($request, CURLOPT_POSTFIELDS, $post_string); // use HTTP POST to send form data	curl_setopt($request, CURLOPT_SSL_VERIFYPEER, FALSE); // uncomment this line if you get no gateway response.	$post_response = curl_exec($request); // execute curl post and store results in $post_response	// additional options may be required depending upon your server configuration	// you can find documentation on curl options at http://www.php.net/curl_setopt	curl_close ($request); // close curl object	// This line takes the response and breaks it into an array using the specified delimiting character	$response_array = explode($post_values["x_delim_char"],$post_response);	// The results are output to the screen in the form of an html numbered list.	if($response_array)	{	return $response_array;	}	  else { return ''; }	}