Question

I want to add a function to a form, so when the submit button is clicked, a function is executed instead of leaving the page.

And I can not use $_POST, because I need the url.

Here is my script :

function submitclicked()
    {
    echo 'Hello World'; 

    }
    <form action="" method="post" id="TransactionAddForm">
    <input type="hidden" id="TransactionAccountID" value="'.$zpid.'" name="data[Transaction][account_id]">
    <input type="hidden" id="TransactionAmount" value="'.$_POST['price'].'" name="data[Transaction][amount]">
    <input type="hidden" id="TransactionDesc" value="'.$desc.'" name="data[Transaction][desc]">
    <input type="hidden" id="TransactionRedirectUrl" value="'.$backurl.'" name="data[Transaction][redirect_url]">
    <div class="submit"><input type="image" src="http://www.zarinpal.com/img/merchant/merchant-6.png" ></div>
    </form>;

Tnx for your help.

Answer 1

Your basic understanding is flawed. PHP is a server side language, meaning, it runs on the server side. It cannot capture button clicks or browser events. It can only work with requests from the client to the server.

Your function may only run after the form was submitted to the server.

For your problem, use JavaScript.

Also, what you have here is not a form. The user has no form controls to choose from here.