diff --git a/f_func/class._Mail.php b/f_func/class._Mail.php
deleted file mode 100644
index 4f3203e3..00000000
--- a/f_func/class._Mail.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-require_once('_common.php');
-require_once(__dir__.'/../d_setting/conf.php');
-
-class _Mail {
-    private $objMail;
-
-    public function __construct() {
-        $this->objMail = newMailObj();
-        $this->objMail->ContentType = 'text/plain';
-        $this->objMail->CharSet = 'utf-8';
-        $this->objMail->Encoding = 'base64';
-    }
-
-    public function Send($to, $subject, $content) {
-        $this->objMail->AddAddress($to);
-        $this->objMail->Subject = '=?utf-8?b?'.base64_encode($subject).'?=';
-        $this->objMail->Body = $content;
-
-        if(!$this->objMail->Send()) {
-            $result['msg'] = $this->objMail->ErrorInfo;
-            $result['result'] = 1;
-        } else {
-            $result['msg'] = 'Successfully sent.';
-            $result['result'] = 0;
-        }
-
-        return $result;
-    }
-}
-
-
diff --git a/f_func/class._Queue.php b/f_func/class._Queue.php
deleted file mode 100644
index d0d9d817..00000000
--- a/f_func/class._Queue.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-require(__dir__.'/../vendor/autoload.php');
-
-class _Queue {
-    private $capacity;
-    private $size;
-    private $head;
-    private $tail;
-    private $arr;
-
-    public function Queue($capacity) {
-        $this->capacity = $capacity;
-        $this->size = 0;
-        $this->head = 0;
-        $this->tail = 0;
-    }
-
-    public function getSize() {
-        return $this->size;
-    }
-
-    public function clear() {
-        $this->size = 0;
-        $this->head = 0;
-        $this->tail = 0;
-    }
-
-    public function push($value) {
-        if($this->size >= $this->capacity) return;
-        $this->arr[$this->tail] = $value;
-        $this->tail = ($this->tail + 1) % $this->capacity;
-        $this->size++;
-    }
-
-    public function pop() {
-        if($this->size <= 0) return null;
-        $value = $this->arr[$this->head];
-        $this->head = ($this->head + 1) % $this->capacity;
-        $this->size--;
-        return $value;
-    }
-}
-
diff --git a/f_func/class._Validation.php b/f_func/class._Validation.php
deleted file mode 100644
index ddcd991f..00000000
--- a/f_func/class._Validation.php
+++ /dev/null
@@ -1,120 +0,0 @@
-<?php
-require(__dir__.'/../vendor/autoload.php');
-require_once(ROOT.'/f_func/class._String.php');
-
-use utilphp\util as util;
-
-class _Validation {
-    public static function CheckID($id) {
-        $len = strlen($id);
-        if($len < 4 || $len > 12) { return 1; }
-        for($i=0; $i < $len; $i++) {
-            $ch = $id[$i];
-            if(($ch < '0' || $ch > '9') && ($ch < 'a' || $ch > 'z')) {
-                return 2;
-            }
-        }
-        return 0;
-    }
-
-    public static function CheckPW($pw) {
-        $len = strlen($pw);
-        if($len < 4 || $len > 12) { return 1; }
-        for($i=0; $i < $len; $i++) {
-            $ch = $pw[$i];
-            if(($ch < '0' || $ch > '9') && ($ch < 'a' || $ch > 'z')) {
-                return 2;
-            }
-        }
-        return 0;
-    }
-
-    public static function CheckPID($pid1, $pid2) {
-        $len1 = strlen($pid1);
-        $len2 = strlen($pid2);
-        if($len1 != 6 || $len2 != 7) { return 1; }
-        for($i=0; $i < $len1; $i++) {
-            $ch = $pid1[$i];
-            if(($ch < '0' || $ch > '9')) {
-                return 2;
-            }
-        }
-        for($i=0; $i < $len2; $i++) {
-            $ch = $pid2[$i];
-            if(($ch < '0' || $ch > '9')) {
-                return 2;
-            }
-        }
-        $year  = $pid1[0].$pid1[1];
-        $month = $pid1[2].$pid1[3];
-        $day   = $pid1[4].$pid1[5];
-        $sex   = $pid2[0];
-        if($year < 50) { return 3; }
-        if($month < 1 || $month > 12) { return 3; }
-        if($day < 1 || $day > 31) { return 3; }
-        if($sex < 1 || $sex > 2) { return 3; }
-        // 주민등록번호 체크
-        $chk = 0;
-        for($i=0; $i <= 5;$i++) {
-            $chk += ($i%8 + 2) * $pid1[$i];
-        }
-        for($i=6; $i <= 11;$i++) {
-            $chk += ($i%8 + 2) * $pid2[$i-6];
-        }
-        $chk = 11 - ($chk % 11);
-        $chk = $chk % 10;
-        if($chk != $pid2[6]) {
-            return 3;
-        }
-        return 0;
-    }
-
-    public static function CheckBirth($pid1, $pid2) {
-        $len1 = strlen($pid1);
-        $len2 = strlen($pid2);
-        if($len1 != 6 || $len2 != 1) { return 1; }
-        for($i=0; $i < $len1; $i++) {
-            $ch = $pid1[$i];
-            if(($ch < '0' || $ch > '9')) {
-                return 2;
-            }
-        }
-        for($i=0; $i < $len2; $i++) {
-            $ch = $pid2[$i];
-            if(($ch < '0' || $ch > '9')) {
-                return 2;
-            }
-        }
-        $year  = $pid1[0].$pid1[1];
-        $month = $pid1[2].$pid1[3];
-        $day   = $pid1[4].$pid1[5];
-        $sex   = $pid2[0];
-        //if($year < 50) { return 3; }
-        if($month < 1 || $month > 12) { return 3; }
-        if($day < 1 || $day > 31) { return 3; }
-        if($sex < 1 || $sex > 4) { return 3; }
-        return 0;
-    }
-
-    public static function CheckName($name) {
-//        $len = strlen($name);
-        $len = _String::GetStrLen($name);
-        if(strchr($name, "<")) { return 1; }
-        if(strchr($name, ">")) { return 2; }
-        if($len < 1 || $len > 6) { return $len; }
-        return 0;
-    }
-
-    public static function CheckEmail($email) {
-        if(util::ends_with($email, '@localhost')){
-            return 0;
-        }
-        if(!preg_match("/^[_\.0-9a-zA-Z-]+@([0-9a-zA-Z][0-9a-zA-Z-]+\.)+[a-zA-Z]{2,6}$/i", $email)) {
-            return 1;
-        } else {
-            return 0;
-        }
-    }
-}
-
-