shortlink support

public/.htaccess

@@ -13,6 +13,12 @@
 
     RewriteEngine On
 
+    # Support shortlinks
+    RewriteCond %{HTTP_HOST} ^(www\.)?stemmech\.com\.au$ [NC]
+    RewriteCond %{REQUEST_FILENAME} !-f
+    RewriteCond %{REQUEST_FILENAME} !-d
+    RewriteRule ^(.*)$ shortlink.php?code=$1 [L,QSA]
+
     # Add www subdomain if missing
     RewriteCond %{HTTP_HOST} ^stemmechanics.com.au$ [NC]
     RewriteRule (.*) https://www.stemmechanics.com.au/$1 [R=301,L]

public/shortlink.php

@@ -0,0 +1,40 @@
+<?php
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+$dotenv = Dotenv\Dotenv::createImmutable(__DIR__ . '/..');
+$dotenv->load();
+
+$dbHost = $_ENV['DB_HOST'];
+$dbPort = $_ENV['DB_PORT'];
+$dbName = $_ENV['DB_NAME'];
+$dbUser = $_ENV['DB_USERNAME'];
+$dbPass = $_ENV['DB_PASSWORD'];
+
+// create connection
+$conn = new mysqli($dbHost, $dbUser, $dbPass, $dbName, $dbPort);
+
+// check connection
+if ($conn->connect_error) {
+    die("Connection failed: " . $conn->connect_error);
+}
+
+// get code from URL
+$code = $_SERVER['REQUEST_URI'];
+$code = trim($code, '/');
+
+// lookup code in database
+$sql = "SELECT url FROM shortlinks WHERE code = '$code'";
+$result = $conn->query($sql);
+
+// if code is found, redirect to URL
+if ($result->num_rows > 0) {
+    $row = $result->fetch_assoc();
+    $url = $row["url"];
+    header("Location: " . $url);
+    exit();
+} else {
+    // if code is not found, redirect to default URL
+    header("Location: https://www.stemmechanics.com.au/");
+    exit();
+}