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bprado · ‎01-06-2010

Hi, im new here, and im trying to make SIM Integration with Authorize.net, first excuse my bad english!!!

everything is OK in my test using the sample code (php version), but when i try to change the defaul amount via Web, then i get a error, i read the forum about putting trim in the variable but still i getting the error.

Here i put diferent trim:

if ($_REQUEST["amount"])
{ $amount = trim($_REQUEST["amount"]); }

if( phpversion() >= '5.1.2' )
{ $fingerprint = hash_hmac("md5", $loginID . "^" . $sequence . "^" . $timeStamp . "^" . trim($amount) . "^", $transactionKey); }
else
{ $fingerprint = bin2hex(mhash(MHASH_MD5, $loginID . "^" . $sequence . "^" . $timeStamp . "^" . trim($amount) . "^", $transactionKey)); }

and i always get this msg: (99) This transaction cannot be accepted.

To enter a different amount via web i change the input field from hidden to text, like this:

echo " <INPUT type='text' name='x_amount' value='$amount' />";

itdevworks · ‎01-06-2010

Here is the full text of the .PHP template page I use for donation forms (where the amount can be entered on the page). Note that while I start from this, I end up changing and fixing things as I go, so this actual code has not been tested as-is. It may need some fixups before running without problem. In particular, you certainly need to provide the API Login and Transaciton Key for whatever account you are using.

<?php
//
// How to use this page...
// 
// NOTE: You can search for [Fixup #] (with the square brackets), where #
//       is the step number from below, to find where in the code to make
//       the changes.
//
//  1. Fill in the appropriate information under the "Site Identity
//     Constants" section below.
//
//  2. Fill in the appropriate information under the "Authorize.net
//     Credentials" below.
//
//  3. (Optional) Select to use the Live or Test server/account.
//     Default=Test.
//
//  4. Find the "How to apply your donation" section in the HTML and fix
//     up according to your needs (different options, checkboxes for
//     multi-select, etc.)
//
//  5. Find the comment "Make Description Here" below and modify the
//     following line to match the control(s) set up in step 3.
//
//  6. Test/Fix/Test/Deploy

//
// [Fixup 1] Site Identity Constants
//
$SiteOwnerName = "site-owner-name";
$PageTitle = "page-title";
$ReturnHomePage = "www.someurl.org"

//
// [Fixup 2] Authorize.net Credentials
//
// Note: The Test account credentials are for my own test account, but you
//       can replace them with your own if you have one.
//
$LiveLoginId = "";
$LiveTransactionKey = "";

$TestLoginId = "***********";
$TestTransactionKey = "****************";

//
// [Fixup 3] Choose live or test server/account
//
$UseTestAccount = true;

//
// Now set the global vars used to process the request
//
$LiveGatewayUrl = "https://secure.authorize.net/gateway/transact.dll";
$TestGatewayUrl = "https://test.authorize.net/gateway/transact.dll";

if ($UseTestAccount) {
    $loginid = $TestLoginId;
    $x_tran_key = $TestTransactionKey;
    $gateway_url = $TestGatewayUrl;
} else {
    $loginid = $LiveLoginId;
    $x_tran_key = $TestTransactionKey;
    $gateway_url = $LiveGatewayUrl;
}


//
// Other Global Vars
//
$doredirect = false;

//
// Includes
//
include ("simlib.php");

//
// did form submit??
//
if (isset($HTTP_POST_VARS["formSubmitted"])){
    $strFirstName = $HTTP_POST_VARS["x_first_name"];
    $strLastName = $HTTP_POST_VARS["x_last_name"];
    //
    // [Fixup 5] Make Description Here
    //
    $strDescription = "[ApplyTo:". trim($HTTP_POST_VARS["ApplyTo"])."] + [Country:" . trim($HTTP_POST_VARS["ForCountry"])."]";
    $amount = $HTTP_POST_VARS["x_amount"];
    if (substr($amount, 0,1) == "$") {
    $amount = substr($amount,1);
    }
    if (is_numeric($amount))
    {
        $doredirect=true;
    } else {
        $msg = "Please enter only a numeric amount.";
    }
}
?>

<?
if ($doredirect == false)
{
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
    <title>- Donations</title>
    <meta name="description" content="<? echo $SiteOwnerName ?>">
    <meta name="resource-type" content="document">
    <meta name="revisit-after" content="14 days">
    <meta name="classification" content="consumer">
    <meta name="keywords" content="<? echo $SiteOwnerName ?>">
    <meta name="robots" content="All">
    <meta name="distribution" content="global">
    <meta name="rating" content="general">
    <meta name="copyright" content="2008">
    <meta name="web author" content="ITDevWorks, LLC: wwww.itdevworks.com">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <style type="text/css">
    <!--
    fieldset
    {
        float: left;
        clear: left;
        width: 400px;
        margin: 0 0 0 0;
        padding: 0em 1em 1em 0;
        border: none;
    }
    
    fieldset legend
    {
        font-size: 1em;
        margin-right: 0;
        padding: 0;
        font-family: Corbel, Geneva, Arial, Helvetica, sans-serif;
        font-size: 1.5em;
        font-weight: 600;
    }
    fieldset ol
    {
        padding: 0;
        border-top: solid 1px black;
        list-style: none;
        margin-left: 10px;
        margin-top: 2px;
    }
    
    fieldset li
    {
        padding: 0 0 0 0;
        float: left;
        clear: left;
        margin: 4px 10px 0 0;
        width: 100%;
        vertical-align: top;
    }
    fieldset label
    {
        float: left;
        font-size: 1em;
        width: 60%;
        margin-top: 3px;
        text-align: left;
    }
    
    fieldset input
    {
        width: 95%;
    }
    
    fieldset select
    {
        width: 38%;
    }
    
    fieldset input.btn-submit
    {
        margin-top: 10px;
        text-align: center;
        width:250px;
    }
    
    -->
    </style>

    <script language="JavaScript">
    <!--
    function IsNumeric(sText)
    
    {
        var ValidChars = "0123456789.";
        var IsNumber=true;
        var Char;
        
        for (i = 0; i < sText.length && IsNumber == true; i++) {
            Char = sText.charAt(i); 
            if (ValidChars.indexOf(Char) == -1) {
                IsNumber = false;
            }
        }
        if (IsNumber==false) {
            alert('Please enter only a number.');
            document.getElementById("formsub").innerHTML = "";
        }
        else {
            document.getElementById("formsub").innerHTML = 
            "<input type=\"submit\" class=\"btn-submit\" value=\"Click " +
            "here for secure payment form\" /><input type=\"hidden\" " +
            "name=\"formSubmitted\" value=\"1\"/>";     
        }
    }
    
    // -->
    </script>
</head>
<html>
<body>
<p style="font-weight: bold; font-family:Arial, Helvetica, Sans-Serif; font-size: 14px;">
    <? echo "$SiteOwnerName -  $PageTitle" ?>
</p>
<? if ($msg<>"") {echo "<p color=red>$msg</p>";} ?>                         
<form method="POST" action="donate.php">
    <div style="text-align:left; font-family: Verdana; font-size:.8em;">
        <fieldset>
        <legend>
        Donation Form
        </legend>
        <ol>
            <li>
                <label for="x_first_name">
                *First name:
                </label>
                <input type="text" name="x_first_name" size="30"/>
            </li>
            <li>
                <label for="x_last_name">
                *Last name:
                </label>
                <input type="text" name="x_last_name"/>
            </li>
            <li>
                <label for="x_amount" >
                *Donation Amount: $
                </label>
                <input type="text" name="x_amount"
                    onblur="IsNumeric(this.value);"/>
            </li>
            <li>
<?
                //
                // [Fixup 4]. Change these controls as per your requirements
                // 
?>
                
                <label for="ApplyTo">
                *How to apply your donation:
                </label>
                <select name="ApplyTo" id="ApplyTo">
                    <option value="As needed" selected>As needed</option>
                    <option value="A good cause">A good cause</option>
                    <option value="Good cause 2">Good cause 2</option>
                    <option value="Good cause 3">Good cause 3</option>
                    <option value="And so on">And so on...</option>
                </select>
            </li>
            <li id="formsub">
                <input type="submit" class="btn-submit"
                    value="Click here for secure payment form" />
                <input type="hidden" name="formSubmitted" value="1"/>
            </li>
        </ol>
        </fieldset>
    </div>
</form>
<? 
} else {// DO REDIRECT
    srand(time());
    $sequence = rand(1, 1000);
    // Insert the form elements required for SIM by calling InsertFP
    $ret = getFP($loginid, $x_tran_key, $amount, $sequence);
    $fields = array(  
        'x_fp_sequence'=>$sequence,  
        'x_fp_timestamp'=>$ret[1],  
        'x_fp_hash'=>$ret[0],  
        'x_description'=>$strDescription,  
        'x_login'=>$loginid,  
        'x_show_form'=>"PAYMENT_FORM",  
        'x_first_name'=>$strFirstName,  
        'x_last_name'=>$strLastName,  
        'x_amount'=>$amount,  
        'x_header_html_payment_form'=>"<div style='font-family: Verdana; font-size: 18px; font-weight: bold;'><i>Thank You</i> from $SiteOwnerName.</div>",  
        'x_footer_html_payment_form'=>"<span style='font-style:italic; font-size:.8em;'>God Bless</span>",  
        'x_receipt_link_method'=>"LINK",  
        'x_receipt_link_text'=>"Return to $SiteOwnerName site", 
        'x_receipt_link_url'=>"http://$ReturnHomePage"
    );  
    echo "<html><head></head><body>";
    echo "<form name='myform' action='$gateway_url' method='post'>";
    foreach ($fields as $key => $value) {
        print "<input type='hidden' name='".$key."' value=\"".$value."\">";
        $fields_string .= "$key=$value";
    }
    echo "</form>";
?>
<script language="javascript" type="text/javascript">
document.myform.submit();
</script>
<?
}
?>
</body>
</html>

Dave Parker
IT DevWorks, LLC
Makers of the I-Bill IT libraries for Authorize.net
Blog: http://www.itdaveworks.com
Twitter: http://twitter.com/rayrad
Site: http://www.itdevworks.com

View solution in original post

stymiee · ‎01-06-2010

Welcome to the community. :)

Do me a favor and post your code before you made any changes to it. It will be easier to troubleshoot it for you that way.

-------------------------------------------------------------------------------------------------------------------------------------------
John Conde :: Certified Authorize.Net Developer (Brainyminds) :: Official Authorize.Net Blogger

NEW! Handling Authorize.Net's Webhooks with PHP

Integrate Every Authorize.Net JSON API with One PHP Class (Sample code included)

Tutorials for integrating Authorize.Net with PHP: AIM, ARB, CIM, Silent Post
All About Authorize.Net's Silent Post

bprado · ‎01-06-2010

thk for the answer, im using the sample code of this web site, http://developer.authorize.net/resources/files/samplecode/php_sim.zip

i only change what i put on the first post, and the only changes were adding a trim and also change "hidden" for "text" in the input field of the amount.

here is the original code:

if ($_REQUEST["amount"])
{ $amount = $_REQUEST["amount"]; }
if ($_REQUEST["description"])

if( phpversion() >= '5.1.2' )
{ $fingerprint = hash_hmac("md5", $loginID . "^" . $sequence . "^" . $timeStamp . "^" . $amount . "^", $transactionKey); }
else
{ $fingerprint = bin2hex(mhash(MHASH_MD5, $loginID . "^" . $sequence . "^" . $timeStamp . "^" . $amount . "^", $transactionKey)); }

echo " <INPUT type='hidden' name='x_amount' value='$amount' />";

if you need all the source code just reply this so i will do a copy and paste

stymiee · ‎01-06-2010

The whole source code you are working with would be ideal. Thanks.

-------------------------------------------------------------------------------------------------------------------------------------------
John Conde :: Certified Authorize.Net Developer (Brainyminds) :: Official Authorize.Net Blogger

NEW! Handling Authorize.Net's Webhooks with PHP

Integrate Every Authorize.Net JSON API with One PHP Class (Sample code included)

Tutorials for integrating Authorize.Net with PHP: AIM, ARB, CIM, Silent Post
All About Authorize.Net's Silent Post

bprado · ‎01-06-2010

The red color are the code that i change, and this code work if i dont change the amount field, when i enter another value in the amount field i get that error.

I add trim because i read in the forums here, that is a posible solution, but in my code dont work!

<HTML lang='en'>
<HEAD>
   <TITLE> Sample SIM Implementation </TITLE>
</HEAD>
<BODY>

$loginID       = "xxxxxxxxxxxxxxxxx";
$transactionKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
$amount        = "19.99";
$description    = "Sample Transaction";
$label            = "Submit Payment"; // The is the label on the 'submit' button
$testMode       = "false";
$url           = "https://test.authorize.net/gateway/transact.dll";

// If an amount or description were posted to this page, the defaults are overidden
if ($_REQUEST["amount"])
   { $amount = Trim($_REQUEST["amount"]); }
if ($_REQUEST["description"])
   { $description = $_REQUEST["description"]; }

// an invoice is generated using the date and time
$invoice   = date(YmdHis);
// a sequence number is randomly generated
$sequence   = rand(1, 1000);
// a timestamp is generated
$timeStamp   = time ();

// The following lines generate the SIM fingerprint. PHP versions 5.1.2 and
// newer have the necessary hmac function built in. For older versions, it
// will try to use the mhash library.
if( phpversion() >= '5.1.2' )
{   $fingerprint = hash_hmac("md5", $loginID . "^" . $sequence . "^" . $timeStamp . "^" . Trim($amount) . "^", $transactionKey); }
else
{ $fingerprint = bin2hex(mhash(MHASH_MD5, $loginID . "^" . $sequence . "^" . $timeStamp . "^" . Trim($amount) . "^", $transactionKey)); }

// Print the Amount and Description to the screen.
echo "Amount: $amount <br />";
echo "Description: $description <br />";

echo "<FORM method='post' action='$url' >";
echo "   <INPUT type='hidden' name='x_login' value='$loginID' />";
echo "   <INPUT type='text' name='x_amount' value='$amount' />";
echo "   <INPUT type='hidden' name='x_description' value='$description' />";
echo "   <INPUT type='hidden' name='x_invoice_num' value='$invoice' />";
echo "   <INPUT type='hidden' name='x_fp_sequence' value='$sequence' />";
echo "   <INPUT type='hidden' name='x_fp_timestamp' value='$timeStamp' />";
echo "   <INPUT type='hidden' name='x_fp_hash' value='$fingerprint' />";
echo "   <INPUT type='hidden' name='x_test_request' value='$testMode' />";
echo "   <INPUT type='hidden' name='x_show_form' value='PAYMENT_FORM' />";
echo "   <input type='submit' value='$label' />";
echo "</FORM>";
?>

</BODY>
</HTML>

itdevworks · ‎01-06-2010

I believe your problem is that you changed the amount field to be a text field and are changing it. The code which generates the hash value incorporates the amount into the hash. This all happens before the page is ever rendered to the client browser, so if you change the x_amount field to something different than what was computed into the hash value, I suspect you would get an error.

This is a common scenario and therefore a common problem. This most typically happens on "donation" type forms where the user of the website wants to be able to enter an amount. The typical way I have seen to work around this is to submit the form back to the same .php file, detect that it was a submit (via a hidden field set in javascript or something), recalculate the hash, regenerate the required form fields with the desired values, and then inject some javascript at the bottom of the page which automatically submits the form to Authorize.net as soon as the page is loaded.

if you need it, I can provide an example of this.

Dave Parker
IT DevWorks, LLC
Makers of the I-Bill IT libraries for Authorize.net
Blog: http://www.itdaveworks.com
Twitter: http://twitter.com/rayrad
Site: http://www.itdevworks.com

stymiee · ‎01-06-2010

Basically what Dave is saying is you are sending the form submission to Authorize.Net with a conflicting hash and total amount. Because the form submission goes straight to Authorize.Net it never reaches any of the PHP code at the top of that file and thus a proper hash is never calculated.

Here's what Dave is trying to explain to get you started (without the JavaScript). It requires two steps. First the user submits the amount they wish to pay and then they submit a second form (just a button that contains all of the proper hidden form values) that takes them to Authorize.Net's payment page to complete the transaction.

<HTML lang='en'>
<HEAD>
    <TITLE> Sample SIM Implementation </TITLE>
</HEAD>
<BODY>
<?php
if (isset($_POST) && is_array($_POST) && count($_POST))
{
    $loginID        = "xxxxxxxxxxxxxxxxx";
    $transactionKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
    $description    = "Sample Transaction";
    $testMode       = "false";
    $amount         = (float) trim($_REQUEST["x_amount"]);
    $invoice        = date(YmdHis);
    $sequence       = rand(1, 1000);
    $timeStamp      = time();

    // The following lines generate the SIM fingerprint. PHP versions 5.1.2 and
    // newer have the necessary hmac function built in. For older versions, it
    // will try to use the mhash library.
    if( phpversion() >= '5.1.2' )
    {
        $fingerprint = hash_hmac("md5", $loginID . "^" . $sequence . "^" . $timeStamp . "^" . $amount . "^", $transactionKey);
    }
    else
    {
        $fingerprint = bin2hex(mhash(MHASH_MD5, $loginID . "^" . $sequence . "^" . $timeStamp . "^" . $amount . "^", $transactionKey));
    }
?>
    <FORM method='post' action='https://test.authorize.net/gateway/transact.dll' >
        <INPUT type='hidden' name='x_login' value='<?php echo $loginID; ?>' />
        <INPUT type='hidden' name='x_amount' value='<?php echo $amount; ?>' />
        <INPUT type='hidden' name='x_description' value='<?php echo $description; ?>' />
        <INPUT type='hidden' name='x_invoice_num' value='<?php echo $invoice; ?>' />
        <INPUT type='hidden' name='x_fp_sequence' value='<?php echo $sequence; ?>' />
        <INPUT type='hidden' name='x_fp_timestamp' value='<?php echo $timeStamp; ?>' />
        <INPUT type='hidden' name='x_fp_hash' value='<?php echo $fingerprint; ?>' />
        <INPUT type='hidden' name='x_test_request' value='<?php echo $testMode; ?>' />
        <INPUT type='hidden' name='x_show_form' value='PAYMENT_FORM' />
        <input type='submit' value='Submit Payment' />
    </FORM>
<?php
}
else
{
?>
    <FORM method='post' action='<?php echo $_SERVER['PHP_SELF']; ?>'>
        Amount: <INPUT type='text' name='x_amount' value='' />
        <input type='submit' value='Enter Amount' />
    </FORM>
<?php
}
?>

</BODY>
</HTML>

This doesn't contain any JavaScript to resubmit the form but should give you an idea of what Dave is saying. If I get a chance I'll add the JavaScript to it later or maybe Dave will beat me to it. ;)

-------------------------------------------------------------------------------------------------------------------------------------------
John Conde :: Certified Authorize.Net Developer (Brainyminds) :: Official Authorize.Net Blogger

NEW! Handling Authorize.Net's Webhooks with PHP

Integrate Every Authorize.Net JSON API with One PHP Class (Sample code included)

Tutorials for integrating Authorize.Net with PHP: AIM, ARB, CIM, Silent Post
All About Authorize.Net's Silent Post

itdevworks · ‎01-06-2010

Here is the full text of the .PHP template page I use for donation forms (where the amount can be entered on the page). Note that while I start from this, I end up changing and fixing things as I go, so this actual code has not been tested as-is. It may need some fixups before running without problem. In particular, you certainly need to provide the API Login and Transaciton Key for whatever account you are using.

<?php
//
// How to use this page...
// 
// NOTE: You can search for [Fixup #] (with the square brackets), where #
//       is the step number from below, to find where in the code to make
//       the changes.
//
//  1. Fill in the appropriate information under the "Site Identity
//     Constants" section below.
//
//  2. Fill in the appropriate information under the "Authorize.net
//     Credentials" below.
//
//  3. (Optional) Select to use the Live or Test server/account.
//     Default=Test.
//
//  4. Find the "How to apply your donation" section in the HTML and fix
//     up according to your needs (different options, checkboxes for
//     multi-select, etc.)
//
//  5. Find the comment "Make Description Here" below and modify the
//     following line to match the control(s) set up in step 3.
//
//  6. Test/Fix/Test/Deploy

//
// [Fixup 1] Site Identity Constants
//
$SiteOwnerName = "site-owner-name";
$PageTitle = "page-title";
$ReturnHomePage = "www.someurl.org"

//
// [Fixup 2] Authorize.net Credentials
//
// Note: The Test account credentials are for my own test account, but you
//       can replace them with your own if you have one.
//
$LiveLoginId = "";
$LiveTransactionKey = "";

$TestLoginId = "***********";
$TestTransactionKey = "****************";

//
// [Fixup 3] Choose live or test server/account
//
$UseTestAccount = true;

//
// Now set the global vars used to process the request
//
$LiveGatewayUrl = "https://secure.authorize.net/gateway/transact.dll";
$TestGatewayUrl = "https://test.authorize.net/gateway/transact.dll";

if ($UseTestAccount) {
    $loginid = $TestLoginId;
    $x_tran_key = $TestTransactionKey;
    $gateway_url = $TestGatewayUrl;
} else {
    $loginid = $LiveLoginId;
    $x_tran_key = $TestTransactionKey;
    $gateway_url = $LiveGatewayUrl;
}


//
// Other Global Vars
//
$doredirect = false;

//
// Includes
//
include ("simlib.php");

//
// did form submit??
//
if (isset($HTTP_POST_VARS["formSubmitted"])){
    $strFirstName = $HTTP_POST_VARS["x_first_name"];
    $strLastName = $HTTP_POST_VARS["x_last_name"];
    //
    // [Fixup 5] Make Description Here
    //
    $strDescription = "[ApplyTo:". trim($HTTP_POST_VARS["ApplyTo"])."] + [Country:" . trim($HTTP_POST_VARS["ForCountry"])."]";
    $amount = $HTTP_POST_VARS["x_amount"];
    if (substr($amount, 0,1) == "$") {
    $amount = substr($amount,1);
    }
    if (is_numeric($amount))
    {
        $doredirect=true;
    } else {
        $msg = "Please enter only a numeric amount.";
    }
}
?>

<?
if ($doredirect == false)
{
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
    <title>- Donations</title>
    <meta name="description" content="<? echo $SiteOwnerName ?>">
    <meta name="resource-type" content="document">
    <meta name="revisit-after" content="14 days">
    <meta name="classification" content="consumer">
    <meta name="keywords" content="<? echo $SiteOwnerName ?>">
    <meta name="robots" content="All">
    <meta name="distribution" content="global">
    <meta name="rating" content="general">
    <meta name="copyright" content="2008">
    <meta name="web author" content="ITDevWorks, LLC: wwww.itdevworks.com">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <style type="text/css">
    <!--
    fieldset
    {
        float: left;
        clear: left;
        width: 400px;
        margin: 0 0 0 0;
        padding: 0em 1em 1em 0;
        border: none;
    }
    
    fieldset legend
    {
        font-size: 1em;
        margin-right: 0;
        padding: 0;
        font-family: Corbel, Geneva, Arial, Helvetica, sans-serif;
        font-size: 1.5em;
        font-weight: 600;
    }
    fieldset ol
    {
        padding: 0;
        border-top: solid 1px black;
        list-style: none;
        margin-left: 10px;
        margin-top: 2px;
    }
    
    fieldset li
    {
        padding: 0 0 0 0;
        float: left;
        clear: left;
        margin: 4px 10px 0 0;
        width: 100%;
        vertical-align: top;
    }
    fieldset label
    {
        float: left;
        font-size: 1em;
        width: 60%;
        margin-top: 3px;
        text-align: left;
    }
    
    fieldset input
    {
        width: 95%;
    }
    
    fieldset select
    {
        width: 38%;
    }
    
    fieldset input.btn-submit
    {
        margin-top: 10px;
        text-align: center;
        width:250px;
    }
    
    -->
    </style>

    <script language="JavaScript">
    <!--
    function IsNumeric(sText)
    
    {
        var ValidChars = "0123456789.";
        var IsNumber=true;
        var Char;
        
        for (i = 0; i < sText.length && IsNumber == true; i++) {
            Char = sText.charAt(i); 
            if (ValidChars.indexOf(Char) == -1) {
                IsNumber = false;
            }
        }
        if (IsNumber==false) {
            alert('Please enter only a number.');
            document.getElementById("formsub").innerHTML = "";
        }
        else {
            document.getElementById("formsub").innerHTML = 
            "<input type=\"submit\" class=\"btn-submit\" value=\"Click " +
            "here for secure payment form\" /><input type=\"hidden\" " +
            "name=\"formSubmitted\" value=\"1\"/>";     
        }
    }
    
    // -->
    </script>
</head>
<html>
<body>
<p style="font-weight: bold; font-family:Arial, Helvetica, Sans-Serif; font-size: 14px;">
    <? echo "$SiteOwnerName -  $PageTitle" ?>
</p>
<? if ($msg<>"") {echo "<p color=red>$msg</p>";} ?>                         
<form method="POST" action="donate.php">
    <div style="text-align:left; font-family: Verdana; font-size:.8em;">
        <fieldset>
        <legend>
        Donation Form
        </legend>
        <ol>
            <li>
                <label for="x_first_name">
                *First name:
                </label>
                <input type="text" name="x_first_name" size="30"/>
            </li>
            <li>
                <label for="x_last_name">
                *Last name:
                </label>
                <input type="text" name="x_last_name"/>
            </li>
            <li>
                <label for="x_amount" >
                *Donation Amount: $
                </label>
                <input type="text" name="x_amount"
                    onblur="IsNumeric(this.value);"/>
            </li>
            <li>
<?
                //
                // [Fixup 4]. Change these controls as per your requirements
                // 
?>
                
                <label for="ApplyTo">
                *How to apply your donation:
                </label>
                <select name="ApplyTo" id="ApplyTo">
                    <option value="As needed" selected>As needed</option>
                    <option value="A good cause">A good cause</option>
                    <option value="Good cause 2">Good cause 2</option>
                    <option value="Good cause 3">Good cause 3</option>
                    <option value="And so on">And so on...</option>
                </select>
            </li>
            <li id="formsub">
                <input type="submit" class="btn-submit"
                    value="Click here for secure payment form" />
                <input type="hidden" name="formSubmitted" value="1"/>
            </li>
        </ol>
        </fieldset>
    </div>
</form>
<? 
} else {// DO REDIRECT
    srand(time());
    $sequence = rand(1, 1000);
    // Insert the form elements required for SIM by calling InsertFP
    $ret = getFP($loginid, $x_tran_key, $amount, $sequence);
    $fields = array(  
        'x_fp_sequence'=>$sequence,  
        'x_fp_timestamp'=>$ret[1],  
        'x_fp_hash'=>$ret[0],  
        'x_description'=>$strDescription,  
        'x_login'=>$loginid,  
        'x_show_form'=>"PAYMENT_FORM",  
        'x_first_name'=>$strFirstName,  
        'x_last_name'=>$strLastName,  
        'x_amount'=>$amount,  
        'x_header_html_payment_form'=>"<div style='font-family: Verdana; font-size: 18px; font-weight: bold;'><i>Thank You</i> from $SiteOwnerName.</div>",  
        'x_footer_html_payment_form'=>"<span style='font-style:italic; font-size:.8em;'>God Bless</span>",  
        'x_receipt_link_method'=>"LINK",  
        'x_receipt_link_text'=>"Return to $SiteOwnerName site", 
        'x_receipt_link_url'=>"http://$ReturnHomePage"
    );  
    echo "<html><head></head><body>";
    echo "<form name='myform' action='$gateway_url' method='post'>";
    foreach ($fields as $key => $value) {
        print "<input type='hidden' name='".$key."' value=\"".$value."\">";
        $fields_string .= "$key=$value";
    }
    echo "</form>";
?>
<script language="javascript" type="text/javascript">
document.myform.submit();
</script>
<?
}
?>
</body>
</html>

Dave Parker
IT DevWorks, LLC
Makers of the I-Bill IT libraries for Authorize.net
Blog: http://www.itdaveworks.com
Twitter: http://twitter.com/rayrad
Site: http://www.itdevworks.com

bprado · ‎01-07-2010

wooooooooooo, this work very well!!!

Thk Dave for that great code, i used it in base to create mine code, also thk John for the help too!!!

thk all!

:D

slim · ‎01-11-2010

I'm glad you got this working. Is there any way you can post your final working code for us newbies? Where there multiple PHP code pages or just the one you worked on here? I'm a Web designer with a client who purchaed Authorize.net to make credit card payments via their Website. Thanks.

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Changing the amount in SIM Integration