Initial commit

indexes/process/modify/item_checkup_subtract.php

@@ -0,0 +1,34 @@
+<?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"];
+    $sql_quant = "SELECT $name FROM $usertype WHERE name='$username'";
+    $res = mysqli_query($conn, $sql_quant);
+
+    if ($res) {
+        $num = mysqli_fetch_array($res);
+
+        if ($num[$name] > 1) {
+            $add = "UPDATE $usertype SET `$name` = `$name` - 1 WHERE name='$username'";
+            $res = mysqli_query($conn, $add);
+        }
+        else {
+            echo "<script type='text/javascript'>
+                	alert('You cannot buy for nothing!');
+              	</script>";
+        }
+    }
+    else {
+        // Handle the SQL query error
+        echo "Error: " . mysqli_error($conn);
+    }
+}
+
+echo "<script type='text/javascript'>
+    window.location.href = '../checkup.php';
+</script>";
+?>