Initial commit

indexes/process/modify/item_modify.php

@@ -0,0 +1,23 @@
+<?php
+    include "../../ConnectDB.php"; 
+    session_start();
+    $username = mysqli_real_escape_string($conn, $_SESSION['username']);
+    $usertype = mysqli_real_escape_string($conn, $_SESSION['user_type']);
+
+    if(isset($_GET["name"], $_GET["quantity"])) {
+        $name = $_GET["name"];
+        $quantity = $_GET["quantity"];
+
+        if(($usertype == "seller" && $quantity >= 0 && $quantity <= 100) || ($usertype == "buyer" && $quantity >= 0)){
+            $add = "UPDATE $usertype SET $name = $quantity WHERE name='$username'";
+            $res = mysqli_query($conn, $add);
+        }
+        else{
+            echo "<script type='text/javascript'>
+                alert('Please input a valid amount of fruit!');
+            </script>";
+        }
+    }
+    header('Location: ../cart_index.php');
+?>
+