Initial commit

indexes/process/modify/item_add.php

@@ -0,0 +1,33 @@
+<?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"])) {
+        $name = $_GET["name"];
+        //seller cannot add more than 100kg
+        if($usertype == "seller"){
+            $sql_check = "SELECT $name FROM seller WHERE name='$username'";
+            $res = mysqli_query($conn, $sql_check);
+            $num = mysqli_fetch_array($res);
+            if($num[$name] + 1 > 100){
+                echo "<script type='text/javascript'>
+                    alert('You cannot sell more than 100kg/fruit one time!');
+                    window.location.href = '../cart_index.php';
+                </script>";
+                exit();
+            }
+        }
+
+        $add = "UPDATE $usertype SET $name = $name + 1 WHERE name='$username'";
+        $res = mysqli_query($conn, $add);
+        if(!$res){
+            echo "<script type='text/javascript'>
+                alert('Error occurred!');
+            </script>";
+        }
+    }
+
+     header('Location: ../cart_index.php');
+?>