Move backend related code to this repo

.gitignore

@@ -0,0 +1,3 @@
+php/composer*
+php/psalm.xml
+php/vendor

php/get.php

@@ -0,0 +1,52 @@
+<?php
+define("ROOT_URL", "http://localhost/");
+define("IMG_DIR", "/var/www/localhost/img/");
+define("IMG_URL", "img/");
+
+main();
+
+function main(): void {
+  $data = json_decode(file_get_contents('php://input'), true);
+  $array = [];
+
+  $category = $data["category"];
+  $directory = IMG_DIR.$category;
+  if (!is_dir($directory)) return;
+  foreach (scandir($directory) as $file) {
+    if ($file === ".") continue;
+    if ($category === "" && $file === "..") continue;
+
+    if ($category != "") $file = $category.'/'.$file;
+    $is_dir = is_dir(IMG_DIR.$file);
+    if (!$is_dir && !is_valid_file_type($file)) continue;
+
+    $file_item = [];
+    $file_item["is_dir"] = $is_dir;
+    $file_item["url"] = ROOT_URL.IMG_URL.$file;
+    array_push($array, $file_item);
+  }
+  echo json_encode($array);
+}
+
+function is_valid_file_type(string $filename): bool {
+  $file_extensions = [
+    // Image extensions
+    'jpg',
+    'jpeg',
+    'png',
+    'gif',
+    'tiff',
+    'bmp',
+    'webp',
+    'svg',
+    // Video extensions
+    'mp4',
+  ];
+
+  foreach ($file_extensions as $file_extension) {
+    if (str_ends_with($filename, $file_extension)) return true;
+  }
+  return false;
+}
+?>
+