Auto Submit?

[Anon]

I was wondering if I could get PHP to automatically submit POST form data for me something like this:

//program to check for duplicate payments

if (customer has not paid yet)
{
//automatically submit form data to authorize.net
}

else //(this is a duplicate payment)
{
//print error html page
}

I need this since authorize.net is not good about checking for duplicate payments. I would like to insert a PHP program like the one above in between my credit number collection page and authorize.net. For the program to work like I want it to it must evaluate the HTTP_POST_VARS, then decide if the cusomter has already paid, by comparing with a database, if the customer has not altready paid, it needs to automatically submit the data to authorize.net.

[gerardg]

You can use header() to send to post data.

[[deleted]]

Uhm.. why all this posting business?

Should you have your system setup so that it will not let anybody submit their payment details for an order they already paid?

[gerardg]

Duh - I was thinking client-side. Nevermind, you can't use header() for that.

You can print out the form, then use javascript (form.submitbuttom.click()) to submit the form. Also print out "If your browser doesn't redirect you, click the submit button"

[Anon]

Yes, I should have my system set up so that it will not let anybody submit thier payment details for an order they already paid.

My system is not set up that way now and I am trying to fix it.

The system I am trying to implement looks at the payment details then decides if the order has already been paid. If it has already been paid, a simple header re-direct is used to display an error page. If the order has not already been paid, then the payment details are posted to authorize.net which handles my credit card processing. I would like to make the post to authorize.net automatic.

After further browsing in the archives, it looks like the Java "document.forms[0].submit();" solution posted by CSN is the best.

[Anon]

I did not try that exact code, but a similar solution from the archives worked well. This is the first Java I have used in my site, but I suppose by now everyone is using java browsers.

//auto post to authorize.net
echo "<SCRIPT LANGUAGE=JavaScript>";
echo "document.forms[0].submit();";
echo "</SCRIPT>";

Thank you so much for your help today.

P.S. I will add the "if you are not redirected..." instruction as you suggest.

Eric

[[deleted]]

Indeed, a javascript solution is easiest.
Just remember to also make a button that the client can press in case the javascript fails!

[Anon]

Slight correction here - you're using Javascript, not Java. Java is an application programming language designed by Sun, Javascript is a scripting language designed by Netscape. The similarity of names almost entirely spurious and has more to do with marketing than anything else.