diff --git a/config.sample.php b/config.sample.php
index 2e2e6e5..938975d 100644
--- a/config.sample.php
+++ b/config.sample.php
@@ -1,10 +1,10 @@
 <?php
-// アプリ
-define('APP_NAME', 'LoliPHP');
+  // アプリ
+  define('APP_NAME', 'LoliPHP');
 
-// データベース
-define('DB_HOST', 'localhost');
-define('DB_USER', '');
-define('DB_PASS', '');
-define('DB_NAME', '');
+  // データベース
+  define('DB_HOST', 'localhost');
+  define('DB_USER', '');
+  define('DB_PASS', '');
+  define('DB_NAME', '');
 ?>
diff --git a/helper.php b/helper.php
index 0d9cda7..bf9eee7 100644
--- a/helper.php
+++ b/helper.php
@@ -1,103 +1,12 @@
-<?php
-require_once('config.php');
-
-// PHP8を実行していない場合
-if (!function_exists('str_starts_with')) {
-  function str_starts_with (string $haystack, string $needle): bool {
-    return (string)$needle !== '' && strncmp($haystack, $needle, strlen($needle)) === 0;
-  }
-}
-
-if (!function_exists('str_ends_with')) {
-  function str_ends_with (string $haystack, string $needle): bool {
-    $needle_len = strlen($needle);
-    return ($needle_len === 0 || 0 === substr_compare($haystack, $needle, - $needle_len));
-  }
-}
-
-if (!function_exists('str_contains')) {
-  function str_contains (string $haystack, string $needle): bool {
-    return $needle !== '' && mb_strpos($haystack, $needle) !== false;
-  }
-}
-
-if (!function_exists('array_key_first')) {
-  function array_key_first (array $array): int|string|null {
-    if (!is_array($array) || empty($array)) return NULL;
-    return array_keys($array)[0];
-  }
-}
-
-if (!function_exists('array_key_last')) {
-  function array_key_last (array $array): int|string|null {
-    if (!is_array($array) || empty($array)) return NULL;
-    return array_keys($array)[count($array)-1];
-  }
-}
-
-// デバッガー
-// Debugger
-function dd ($val) {
-  echo '<pre>';
-  var_dump($val);
-  echo '</pre>';
-  die();
-}
-
-// データベースエンジン
-// Database engine
-require_once('helper/db.php');
-
-// リクエスト
-// Request
-function request (string $name): array {
-  if (isset($_POST[$name])) {
-    return ['post' => htmlspecialchars($name)];
-  }
-  else if (isset($_GET[$name])) {
-    return ['get' => htmlspecialchars($name)];
-  }
-  else if (isset($_REQUEST[$name])) {
-    return ['request' => htmlspecialchars($name)];
-  }
-
-  return ['error' => ''];
-}
-
-function request_all (): array {
-  $res = [];
-  if (!empty($_POST)) {
-    $res['post'] = [];
-    foreach ($_POST as $k => $v) $res['post'][$k] = htmlspecialchars($v);
-  }
-  if (!empty($_GET)) {
-    $res['get'] = [];
-    foreach ($_GET as $k => $v) $res['get'][$k] = htmlspecialchars($v);
-  }
-  if (!empty($_REQUEST)) {
-    $res['request'] = [];
-    foreach ($_REQUEST as $k => $v) $res['request'][$k] = htmlspecialchars($v);
-  }
-
-  return $res;
-}
-
-// ファイルアップロード
-function loliupload () {}
-
-// CURL
-function lolicurl () {}
-
-// クッキー
-function getcookie (string $name): array { return htmlspecialchars($_COOKIE[$name]); }
-
-function getrawcookie (string $name): array { return $_COOKIE[$name]; }
-
-// メール
-function lolimail () {}
-
-// セッション
-
-// ハッシュ
-
+<?php 
+  require_once('./helper/php8compat.php'); // PHP8を実行していない場合・If not running PHP8
+  require_once('./helper/debug.php'); // デバッガー・Debugger
+  require_once('./helper/db.php'); // データベースエンジン・Database engine
+  require_once('./helper/request.php'); // リクエスト・Request
+  require_once('./helper/upload.php'); // ファイルアップロード・File upload
+  require_once('./helper/curl.php'); // CURL
+  require_once('./helper/cookie.php'); // クッキー・Cookie
+  require_once('./helper/mail.php'); // メール・Mail
+  require_once('./helper/session.php'); // セッション・Session
+  require_once('./helper/hash.php'); // ハッシュ・Hash
 ?>
diff --git a/helper/cookie.php b/helper/cookie.php
new file mode 100644
index 0000000..81dbb17
--- /dev/null
+++ b/helper/cookie.php
@@ -0,0 +1,9 @@
+<?php
+  function getcookie (string $name): array {
+    return htmlspecialchars($_COOKIE[$name]);
+  }
+
+  function getrawcookie (string $name): array {
+    return $_COOKIE[$name];
+  }
+?>
diff --git a/helper/curl.php b/helper/curl.php
new file mode 100644
index 0000000..63a8f65
--- /dev/null
+++ b/helper/curl.php
@@ -0,0 +1,3 @@
+<?php
+  function lolicurl () {}
+?>
diff --git a/helper/db.php b/helper/db.php
index 877f9f7..76b1223 100644
--- a/helper/db.php
+++ b/helper/db.php
@@ -1,164 +1,164 @@
 <?php
-/* val
- * 
- * select => ['var1', 'var2'...]
- * insert|update|where => ['key1' => 'value1', 'key2' => 'value2'...]
- * order => ['var', 'asc'|'desc']
- * limit => int
- * */
-function lolidb (string $table, array $val, string $mode='select'): array|bool {
-  // モードは違う場合、やめる。If the mode is wrong, stop.
-  if ($mode != 'select' && $mode != 'one' && $mode != 'insert' && $mode != 'update' && $mode != 'delete') {
-    dd("モードは「select」、「one」、「insert」、「update」、「delete」です。\nMode should be \"select\", \"one\", \"insert\", \"update\", or \"delete\".");
-    return false;
-  }
+  require_once('../config.php');
 
-  // 順のチェック。Check order.
-  if (isset($val['order'])) {
-    // selectかoneじゃない場合。If not select or one.
-    if ($mode !== 'select' || $mode !== 'one') {
-      dd("「order」は「select」又は「one」のみで使えます。\n\"order\" can only be used with \"select\" or \"one\".");
+  /* val
+   * 
+   * select => ['var1', 'var2'...]
+   * insert|update|where => ['key1' => 'value1', 'key2' => 'value2'...]
+   * order => ['var', 'asc'|'desc']
+   * limit => int
+   * */
+  function lolidb (string $table, array $val, string $mode='select'): array|bool {
+    // モードは違う場合、やめる。If the mode is wrong, stop.
+    if ($mode != 'select' && $mode != 'one' && $mode != 'insert' && $mode != 'update' && $mode != 'delete') {
+      dd("モードは「select」、「one」、「insert」、「update」、「delete」です。\nMode should be \"select\", \"one\", \"insert\", \"update\", or \"delete\".");
       return false;
     }
 
-    // 複数の場合。If multiple.
-    if (count($val['order'] > 1)) {
-      dd("複数「order」は未対応です。\nMultiple \"order\" is not yet supported.");
-      return false;
+    // 順のチェック。Check order.
+    if (isset($val['order'])) {
+      // selectかoneじゃない場合。If not select or one.
+      if ($mode !== 'select' || $mode !== 'one') {
+        dd("「order」は「select」又は「one」のみで使えます。\n\"order\" can only be used with \"select\" or \"one\".");
+        return false;
+      }
+
+      // 複数の場合。If multiple.
+      if (count($val['order'] > 1)) {
+        dd("複数「order」は未対応です。\nMultiple \"order\" is not yet supported.");
+        return false;
+      }
+
+      // ascかdescかどうか。Whether it's asc or desc.
+      foreach ($val['order'] as $k => $v) {
+        if ($v !== 'asc' && $v !== 'desc') {
+          dd("「order」は「asc」又は「desc」です。\n\"order\" should be \"asc\" or \"desc\".");
+          return false;
+        }
+      }
     }
 
-    // ascかdescかどうか。Whether it's asc or desc.
-    foreach ($val['order'] as $k => $v) {
-      if ($v !== 'asc' && $v !== 'desc') {
-        dd("「order」は「asc」又は「desc」です。\n\"order\" should be \"asc\" or \"desc\".");
+    // 限界のチェック。Check limit.
+    if (($mode === 'select' || $mode === 'one') && isset($val['limit'])) {
+      // oneの場合。If one.
+      if ($mode === 'one') {
+        dd("「one」の場合、「limit」はいつでも「1」です。「limit」は1以上は必要の場合、「select」を使って下さい。\nIn case of \"one\", \"limit\" is always \"1\". If \"limit\" needs to be more than \"1\", please use \"select\".");
+        return false;
+      }
+
+      // selectじゃない場合。If not select.
+      else if ($mode !== 'select') {
+        dd("「insert」、「update」及び「delete」で、「limit」を使えません。\n\"limit\" cannot be used with \"insert\", \"update\", and \"delete\".");
         return false;
       }
     }
-  }
 
-  // 限界のチェック。Check limit.
-  if (($mode === 'select' || $mode === 'one') && isset($val['limit'])) {
-    // oneの場合。If one.
-    if ($mode === 'one') {
-      dd("「one」の場合、「limit」はいつでも「1」です。「limit」は1以上は必要の場合、「select」を使って下さい。\nIn case of \"one\", \"limit\" is always \"1\". If \"limit\" needs to be more than \"1\", please use \"select\".");
+    // insertの場合。In case of insert.
+    if ($mode === 'insert' && !isset($val['insert'])) {
+      dd("「insert」モードの場合、「insert」値は必須です。\nIn case of \"insert\" mode, \"insert\" value is necessary.");
       return false;
     }
 
-    // selectじゃない場合。If not select.
-    else if ($mode !== 'select') {
-      dd("「insert」、「update」及び「delete」で、「limit」を使えません。\n\"limit\" cannot be used with \"insert\", \"update\", and \"delete\".");
+    // updateの場合。In case of update.
+    if ($mode === 'update' && !isset($val['update'])) {
+      dd("「update」モードの場合、「update」値は必須です。\nIn case of \"update\" mode, \"update\" value is necessary.");
       return false;
     }
-  }
 
-  // insertの場合。In case of insert.
-  if ($mode === 'insert' && !isset($val['insert'])) {
-    dd("「insert」モードの場合、「insert」値は必須です。\nIn case of \"insert\" mode, \"insert\" value is necessary.");
-    return false;
-  }
+    // MySQLiの創作。Creation of MySQLi.
+    $mysqli = mysqli_connect(DB_HOST, DB_USER, DB_PASS, DB_TABLE);
+    $result = null;
 
-  // updateの場合。In case of update.
-  if ($mode === 'update' && !isset($val['update'])) {
-    dd("「update」モードの場合、「update」値は必須です。\nIn case of \"update\" mode, \"update\" value is necessary.");
-    return false;
-  }
-
-  // MySQLiの創作。Creation of MySQLi.
-  $mysqli = mysqli_connect(DB_HOST, DB_USER, DB_PASS, DB_TABLE);
-  $result = null;
-
-  if ($mode == 'select' || $mode == 'one') {
-    // select値がなければ、全部を選択する。If there is no select value, select everything.
-    if (!isset($val['select'])) $val['select'] = ['*'];
-    $query = 'SELECT '.$val['select'].' FROM '.$table;
-
-    if (isset($val['where'])) {
-      $query .= ' WHERE ';
-      foreach ($val['where'] as $k => $v) {
-        $query .= $k.' = '.$v;
-        if ($k !== array_key_last($val['where'])) $query .= ' AND ';
+    if ($mode == 'select' || $mode == 'one') {
+      // select値がなければ、全部を選択する。If there is no select value, select everything.
+      if (!isset($val['select'])) {
+        $val['select'] = ['*'];
       }
-    }
 
-    if (isset($val['order'])) {
-      $query .= ' ORDER BY ';
-      foreach ($val['order'] as $k => $v) {
-        $query .= $k;
-        $query .= ' '.strtoupper($v);
+      $query = 'SELECT '.$val['select'].' FROM '.$table;
+
+      if (isset($val['where'])) {
+        $query .= ' WHERE ';
+        foreach ($val['where'] as $k => $v) {
+          $query .= $k.' = '.$v;
+          if ($k !== array_key_last($val['where'])) $query .= ' AND ';
+        }
       }
-    }
 
-    if ($mode == 'one') $query .= ' LIMIT 1';
+      if (isset($val['order'])) {
+        $query .= ' ORDER BY ';
+        foreach ($val['order'] as $k => $v) {
+          $query .= $k;
+          $query .= ' '.strtoupper($v);
+        }
+      }
+
+      if ($mode == 'one') {
+        $query .= ' LIMIT 1';
+      }
+      else {
+        if (isset($val['limit'])) {
+          $query .= ' LIMIT '.(int)$val['limit'];
+        }
+      }
+
+      $result = mysqli_query($mysqli, $query.';');
+      $row = mysqli_fetch_assoc($result);
+    }
     else {
-      if (isset($val['limit'])) $query .= ' LIMIT '.(int)$val['limit'];
-    }
-
-    $result = mysqli_query($mysqli, $query.';');
-    $row = mysqli_fetch_assoc($result);
-  }
-  else {
-    if ($mode == 'insert') {
-      $query .= 'INSERT INTO '.$table.' (';
-      foreach ($val['insert'] as $k => $v) {
-        $query .= $k;
-        if ($k !== array_key_last($val['insert'])) $query .= ', ';
+      if ($mode == 'insert') {
+        $query .= 'INSERT INTO '.$table.' (';
+        foreach ($val['insert'] as $k => $v) {
+          $query .= $k;
+          if ($k !== array_key_last($val['insert'])) {
+            $query .= ', ';
+          }
+        }
+        $query .= ') VALUES (';
+        foreach ($val['insert'] as $k => $v) {
+          $query .= $v;
+          if ($k !== array_key_last($val['insert'])) {
+            $query .= ', ';
+          }
+        }
+        $query .= ')';
       }
-      $query .= ') VALUES (';
-      foreach ($val['insert'] as $k => $v) {
-        $query .= $v;
-        if ($k !== array_key_last($val['insert'])) $query .= ', ';
-      }
-      $query .= ')';
-    }
-    else if ($mode == 'update') {
-      $query .= 'UPDATE '.$table.' SET ';
-      foreach ($val['update'] as $k => $v) {
-        $query .= $k.' = '.$v;
-        if ($k !== array_key_last($val['update'])) $query .= ', ';
-      }
-
-      if (isset($val['where'])) {
-        $query .= ' WHERE ';
-        foreach ($val['where'] as $k => $v) {
+      else if ($mode == 'update') {
+        $query .= 'UPDATE '.$table.' SET ';
+        foreach ($val['update'] as $k => $v) {
           $query .= $k.' = '.$v;
-          if ($k !== array_key_last($val['where'])) $query .= ' AND ';
+          if ($k !== array_key_last($val['update'])) {
+            $query .= ', ';
+          }
+        }
+
+        if (isset($val['where'])) {
+          $query .= ' WHERE ';
+          foreach ($val['where'] as $k => $v) {
+            $query .= $k.' = '.$v;
+            if ($k !== array_key_last($val['where'])) {
+              $query .= ' AND ';
+            }
+          }
         }
       }
-    }
-    else if ($mode == 'delete') {
-      $query .= 'DELETE FROM '.$table;
+      else if ($mode == 'delete') {
+        $query .= 'DELETE FROM '.$table;
 
-      if (isset($val['where'])) {
-        $query .= ' WHERE ';
-        foreach ($val['where'] as $k => $v) {
-          $query .= $k.' = '.$v;
-          if ($k !== array_key_last($val['where'])) $query .= ' AND ';
+        if (isset($val['where'])) {
+          $query .= ' WHERE ';
+          foreach ($val['where'] as $k => $v) {
+            $query .= $k.' = '.$v;
+            if ($k !== array_key_last($val['where'])) {
+              $query .= ' AND ';
+            }
+          }
         }
       }
+
+      $stmt = mysqli_prepare($mysqli, $query.';');
     }
 
-    $stmt = mysqli_prepare($mysqli, $query.';');
+    return $row;
   }
-
-  return $row;
-}
-
-function lolilog (string $val, string $mode='info'): bool {
-  if (!$file = fopen('./lolilog', 'a+')) {
-    dd('lolilogファイルを開けられません。');
-    return false;
-  }
-
-  $time = time();
-
-  $logtext = '['.date('Y-m-d H:i:s T', $time).' ('.$time.') - '.mb_strtoupper($mode)."]\n".$val."\n\n";
-
-  if (fwrite($file, $logtext) === false) {
-    dd('lolilogファイルに書き出しに失敗しました。');
-    return false;
-  }
-
-  fclose($file);
-  return true;
-}
 ?>
diff --git a/helper/debug.php b/helper/debug.php
new file mode 100644
index 0000000..c235f9e
--- /dev/null
+++ b/helper/debug.php
@@ -0,0 +1,26 @@
+<?php
+  function dd ($val) {
+    echo '<pre>';
+    var_dump($val);
+    echo '</pre>';
+    die();
+  }
+
+  function lolilog (string $val, string $mode='info'): bool {
+    if (!$file = fopen('./lolilog', 'a+')) {
+      dd('lolilogファイルを開けられません。');
+      return false;
+    }
+
+    $time = time();
+    $logtext = '['.date('Y-m-d H:i:s T', $time).' ('.$time.') - '.mb_strtoupper($mode)."]\n".$val."\n\n";
+
+    if (fwrite($file, $logtext) === false) {
+      dd('lolilogファイルに書き出しに失敗しました。');
+      return false;
+    }
+
+    fclose($file);
+    return true;
+  }
+?>
diff --git a/helper/hash.php b/helper/hash.php
new file mode 100644
index 0000000..acb6c35
--- /dev/null
+++ b/helper/hash.php
@@ -0,0 +1,2 @@
+<?php
+?>
diff --git a/helper/mail.php b/helper/mail.php
new file mode 100644
index 0000000..0b215eb
--- /dev/null
+++ b/helper/mail.php
@@ -0,0 +1,3 @@
+<?php
+  function lolimail () {}
+?>
diff --git a/helper/php8compat.php b/helper/php8compat.php
new file mode 100644
index 0000000..938c0e1
--- /dev/null
+++ b/helper/php8compat.php
@@ -0,0 +1,34 @@
+<?php
+  if (!function_exists('str_starts_with')) {
+    function str_starts_with (string $haystack, string $needle): bool {
+      return (string)$needle !== '' && strncmp($haystack, $needle, strlen($needle)) === 0;
+    }
+  }
+
+  if (!function_exists('str_ends_with')) {
+    function str_ends_with (string $haystack, string $needle): bool {
+      $needle_len = strlen($needle);
+      return ($needle_len === 0 || 0 === substr_compare($haystack, $needle, - $needle_len));
+    }
+  }
+
+  if (!function_exists('str_contains')) {
+    function str_contains (string $haystack, string $needle): bool {
+      return $needle !== '' && mb_strpos($haystack, $needle) !== false;
+    }
+  }
+
+  if (!function_exists('array_key_first')) {
+    function array_key_first (array $array): int|string|null {
+      if (!is_array($array) || empty($array)) return NULL;
+      return array_keys($array)[0];
+    }
+  }
+
+  if (!function_exists('array_key_last')) {
+    function array_key_last (array $array): int|string|null {
+      if (!is_array($array) || empty($array)) return NULL;
+      return array_keys($array)[count($array)-1];
+    }
+  }
+?>
diff --git a/helper/request.php b/helper/request.php
new file mode 100644
index 0000000..8385293
--- /dev/null
+++ b/helper/request.php
@@ -0,0 +1,33 @@
+<?php
+function request (string $name): array {
+  if (isset($_POST[$name])) {
+    return ['post' => htmlspecialchars($name)];
+  }
+  else if (isset($_GET[$name])) {
+    return ['get' => htmlspecialchars($name)];
+  }
+  else if (isset($_REQUEST[$name])) {
+    return ['request' => htmlspecialchars($name)];
+  }
+
+  return ['error' => ''];
+}
+
+function request_all (): array {
+  $res = [];
+  if (!empty($_POST)) {
+    $res['post'] = [];
+    foreach ($_POST as $k => $v) $res['post'][$k] = htmlspecialchars($v);
+  }
+  if (!empty($_GET)) {
+    $res['get'] = [];
+    foreach ($_GET as $k => $v) $res['get'][$k] = htmlspecialchars($v);
+  }
+  if (!empty($_REQUEST)) {
+    $res['request'] = [];
+    foreach ($_REQUEST as $k => $v) $res['request'][$k] = htmlspecialchars($v);
+  }
+
+  return $res;
+}
+?>
diff --git a/helper/session.php b/helper/session.php
new file mode 100644
index 0000000..acb6c35
--- /dev/null
+++ b/helper/session.php
@@ -0,0 +1,2 @@
+<?php
+?>
diff --git a/helper/upload.php b/helper/upload.php
new file mode 100644
index 0000000..e333e2d
--- /dev/null
+++ b/helper/upload.php
@@ -0,0 +1,3 @@
+<?php
+  function loliupload () {}
+?>