How can PHP variables be passed to a PayPal Smart Button for a variable price?

To pass PHP variables to a PayPal Smart Button for a variable price, you can use the JavaScript SDK provided by PayPal to dynamically set the price when the button is clicked. You can generate the Smart Button code in PHP and include placeholders for the price variables. Then, use JavaScript to replace these placeholders with the actual price values from your PHP variables when the button is clicked. 

<?php
// PHP variables for price
$price = 10.00;

// Generate Smart Button code with placeholder for price
$smartButtonCode = '
<script src="https://www.paypal.com/sdk/js?client-id=YOUR_CLIENT_ID"></script>
<div id="paypal-button-container"></div>
<script>
  paypal.Buttons({
    createOrder: function(data, actions) {
      return actions.order.create({
        purchase_units: [{
          amount: {
            value: "{{price}}"
          }
        }]
      });
    },
    onApprove: function(data, actions) {
      return actions.order.capture().then(function(details) {
        alert("Transaction completed by " + details.payer.name.given_name);
      });
    }
  }).render("#paypal-button-container");

  // Replace placeholder with actual price from PHP variable
  document.addEventListener("DOMContentLoaded", function() {
    document.querySelector("#paypal-button-container").innerHTML = document.querySelector("#paypal-button-container").innerHTML.replace("{{price}}", "'.$price.'");
  });
</script>
';

echo $smartButtonCode;
?>

Keywords

PHP variables PayPal Smart Button variable price integration

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