How can I use a submit button inside a PHP variable to store to the db?

Question

I am trying to store a variable in a database when the user clicks the submit button. However, as my submit button is inside of a PHP variable when I am using isset, it doesn't work. Is there another solution or a trick to that?

$pp_checkout_btn .= '<form id="paypal" action="https://www.paypal.com/cgi-bin/webscr" method="post">
    <input name="terms"  type="checkbox" required value="agree" form="paypal"  /><label>Agree with terms & Conditions *</label>
    <input type="submit" name="submit1" id="changebutton" value="ΕΠΙΒΕΒΑΙΩΣΗ ΠΑΡΑΓΓΕΛΙΑΣ"  /></form>';

 if(isset($_POST['submit1'])){
//update orders to accept terms
$updatesql=mysql_query("UPDATE orders SET terms='agree' WHERE checkout_id='$checkout_id'") or die(mysql_error());  }

That form posts to paypal.com, you will never see the request. Check the PayPal developer manual on how to integrate it with your site. — Halcyon
– Halcyon, Commented Apr 10, 2015 at 13:50
Unless you echo or print $pp_checkout_btn, it doesn't exist in the HTML document. I didn't see an echo or print. — TecBrat
– TecBrat, Commented Apr 10, 2015 at 14:37

Michael Czolko · Accepted Answer · 2015-04-10 13:56:14Z

2

First of all double check your 'action' in the form if it's correct and your if isset statement has to look like this: if(isset($_POST['submit1'])) because form method is POST

answered Apr 10, 2015 at 13:56

Michael Czolko

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Pushkar · Accepted Answer · 2015-04-10 15:02:12Z

you can call an js function at onsubmit event in ur form. In your function send an ajax request to a PHP page that saves the data u need to save.

I am assuming ur echoing the variable in a HTML page.

<form id="paypal" action="https://www.paypal.com/cgi-bin/webscr" method="post" onsubmit="return myFunction()" name="paypal" >
<input name="terms"  type="checkbox" required value="agree" form="paypal"  /><label>Agree with terms & Conditions *</label>
<input type="submit" name="submit1" id="changebutton" value="ΕΠΙΒΕΒΑΙΩΣΗ ΠΑΡΑΓΓΕΛΙΑΣ"  /></form>'

now the function:

<script>
function myFunction(){
var str= document.forms["paypal"]["terms"].value;
var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {

        }
    }
    xmlhttp.open("GET", "save.php?q=" + str, true);
    xmlhttp.send();
}
</script>

now save.PHP

<?php
if(isset($_GET['q'])){
 //your update query  
 }
  ?>

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