Good authorize.net PHP libraries

Question

I'm working on a PHP project and am looking for a good authorize.net gateway. I want something with mature code that's tested. The goal is to avoid writing and testing the entire thing myself based on the authorize.net api docs.

Does anyone know of any good PHP libraries for this? I've search Google to no avail.

Answer 1

Authorize.net provides its own SDK for PHP and other languages. There is probably no need to look elsewhere.

Answer 2

You're in luck. This is what I use (for the SIM gateway):

include("../../simdata.php");
...
<!--form action="https://test.authorize.net/gateway/transact.dll" method="POST"-->
<FORM action="https://secure.authorize.net/gateway/transact.dll" method="POST">
<?
$x_description = "website.com";
$currency = "";
$tstamp = time();
// Seed random number for security and better randomness.
srand(time());
$sequence = rand(1, 1000);
$data = "$x_loginid^$sequence^$tstamp^$total^$currency";
#echo "data = $data\n";
#echo $x_tran_key;
$fingerprint = bin2hex(mhash(MHASH_MD5, $data, $x_tran_key));
# php 5 only $fingerprint = hash_hmac("md5", $data, $x_tran_key);
echo ("<input type='hidden' name='x_fp_sequence' value='" . $sequence . "'>\n" );
echo ("<input type='hidden' name='x_fp_timestamp' value='" . $tstamp . "'>\n" );
echo ("<input type='hidden' name='x_fp_hash' value='" . $fingerprint . "'>\n" );
echo ("<input type=\"hidden\" name=\"x_description\" value=\"" . $x_description . "\">\n" );
echo ("<input type=\"hidden\" name=\"x_login\" value=\"$x_loginid\">\n");
echo ("<input type=\"hidden\" name=\"x_amount\" value=\"$total\">\n");

?>
<input type="hidden" name="x_first_name" value="<?=firstName($_SESSION['user']['name'])?>">
<input type="hidden" name="x_last_name" value="<?=lastName($_SESSION['user']['name'])?>">
<input type="hidden" name="x_company" value="<?=$_SESSION['user']['company']?>">
<input type="hidden" name="x_address" value="<?=$_SESSION['user']['address']?>">
<input type="hidden" name="x_city" value="<?=$_SESSION['user']['city']?>">
<input type="hidden" name="x_state" value="<?=$_SESSION['user']['state']?>">
<input type="hidden" name="x_zip" value="<?=$_SESSION['user']['zip']?>">
<input type="hidden" name="x_phone" value="<?=$_SESSION['user']['phone']?>">
<input type="hidden" name="x_email" value="<?=$_SESSION['user']['email']?>">
<input type="hidden" name="x_cust_id" value="<?=$_SESSION['user']['username']?>">
<INPUT TYPE="HIDDEN" name="x_logo_url" VALUE= "https://secure.authorize.net/mgraphics/logo_99999.gif">
<INPUT type="hidden" name="x_show_form" value="PAYMENT_FORM">
<!--INPUT type="hidden" name="x_test_request" value="TRUE"-->

<!--input type="hidden" name="x_receipt_link_method" value="POST">
<input type="hidden" name="x_receipt_link_text" value="Click for listings">
<input type="hidden" name="x_receipt_link_url" value="http://website.com/confirmation.php"-->

<input type="hidden" name="x_relay_response" value="TRUE">
<input type="hidden" name="x_relay_url" value="http://website.com/confirmation.php">
<input type="hidden" name="<?=session_name()?>" value="<?=session_id()?>">

<input type="hidden" name="" value="">
<input type="hidden" name="" value="">
<input type="hidden" name="" value="">
<? if ($total==0) { ?>
    <a href="account.php">Your Account</a>
<? } else { ?>
    <INPUT type="submit" value="Accept Order">
<? } ?>
</form> 

And this is what I use for the confirmation.php

include("../../simdata.php");
#print_r($_POST);

// verify transaction comes from authorize.net and save user details
$responseCode = $_POST['x_response_code'];
if ( $responseCode == 1) { // approved
    $md5 = $_POST['x_MD5_Hash'];
    $transId = $_POST['x_trans_id'];
    $amount = $_POST['x_amount'];
    $myMD5 = strtoupper(md5("$x_tran_key$x_loginid$transId$amount"));
    #echo $myMD5;
    #print_r ($_POST);
    #print_r ($_SESSION['user']);

    if ($myMD5 == $md5) { // authenticated response from authorize.net
       ...
    } else {
        $error = "Unauthenticated response.";
    }
} else if (isset($_POST['x_response_code'])) { // error
    $error = $_POST['x_response_reason_text'].", #".$_POST['x_response_code'].'.'.$_POST['x_response_subcode'].
        '.'.$_POST['x_response_reason_code'];
}