adding the items on the receipt script

OTHER_INFORMATION/php files/itemsOnReceipt.php

+<?php 
+
+if(isset($_POST['bookingID']) && isset($_POST['itemName'])&& isset($_POST['itemQuantity'])){
+
+require_once 'connect_db.php';
+
+    $itemQuantity = htmlspecialchars($_POST['itemQuantity']);
+    $itemName = htmlspecialchars($_POST['itemName']);
+    $bookingID = htmlspecialchars($_POST['bookingID']);
+
+    $stmt = mysqli_stmt_init($connect);
+    $sql = 'INSERT INTO `items_on_receipt_museum`(receipt_bookingID,item_name,item_quantity) VALUES (?,?,?)'; 
+        if(!mysqli_stmt_prepare($stmt,$sql)){
+
+        echo 'failure';
+    }
+
+    else{
+        mysqli_stmt_bind_param($stmt,'isi',$bookingID,$itemName,$itemQuantity);
+        mysqli_stmt_execute($stmt);
+
+        echo 'success';
+    }
+    mysqli_stmt_close($stmt);
+}
+
+else{
+    echo 'check_isset';
+}
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