init

contactform/contactform.js

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+/* 수지 AI·데이터 아카데미 Contact Form - lightweight AJAX submitter
+ * Expects the server endpoint to respond with plain text: "OK" on success, otherwise an error message.
+ */
+(function () {
+  "use strict";
+
+  function byId(id) { return document.getElementById(id); }
+
+  function show(el, visible) {
+    if (!el) return;
+    el.style.display = visible ? "block" : "none";
+  }
+
+  function setText(el, text) {
+    if (!el) return;
+    el.textContent = text || "";
+  }
+
+  function validateEmail(email) {
+    return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(String(email || "").trim());
+  }
+
+  function getFormMessage(form) {
+    var name = (form.querySelector('input[name="name"]') || {}).value || "";
+    if (name.trim().length < 2) return "이름을 입력해주세요.";
+
+    var email = (form.querySelector('input[name="email"]') || {}).value || "";
+    if (!validateEmail(email)) return "이메일을 올바르게 입력해주세요.";
+
+    var subject = (form.querySelector('input[name="subject"]') || {}).value || "";
+    if (subject.trim().length < 4) return "제목을 입력해주세요.";
+
+    var message = (form.querySelector('textarea[name="message"]') || {}).value || "";
+    if (message.trim().length < 10) return "내용을 조금 더 자세히 입력해주세요(10자 이상).";
+
+    return null;
+  }
+
+  document.addEventListener("DOMContentLoaded", function () {
+    var forms = document.querySelectorAll("form.contactForm");
+    if (!forms || !forms.length) return;
+
+    Array.prototype.forEach.call(forms, function (form) {
+      form.addEventListener("submit", function (e) {
+        e.preventDefault();
+
+        var sendmessage = byId("sendmessage");
+        var errormessage = byId("errormessage");
+
+        show(sendmessage, false);
+        show(errormessage, false);
+        setText(errormessage, "");
+
+        var validationMsg = getFormMessage(form);
+        if (validationMsg) {
+          setText(errormessage, validationMsg);
+          show(errormessage, true);
+          return;
+        }
+
+        var action = form.getAttribute("action") || "contactform/contactform.php";
+
+        var fd = new FormData(form);
+
+        fetch(action, {
+          method: "POST",
+          body: fd,
+          credentials: "same-origin"
+        })
+          .then(function (res) { return res.text(); })
+          .then(function (text) {
+            var t = (text || "").trim();
+            if (t === "OK") {
+              show(sendmessage, true);
+              setText(errormessage, "");
+              show(errormessage, false);
+              form.reset();
+            } else {
+              setText(errormessage, t || "메일 전송에 실패했습니다. 잠시 후 다시 시도해주세요.");
+              show(errormessage, true);
+            }
+          })
+          .catch(function () {
+            setText(errormessage, "메일 전송 중 오류가 발생했습니다. 네트워크/서버 상태를 확인해주세요.");
+            show(errormessage, true);
+          });
+      });
+    });
+  });
+})();
+
+

contactform/contactform.php

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+<?php
+// 수지 AI·데이터 아카데미 Contact Form mail handler
+// Returns plain text: "OK" on success, otherwise an error message.
+
+header('Content-Type: text/plain; charset=UTF-8');
+
+function fail($msg) {
+  http_response_code(400);
+  echo $msg;
+  exit;
+}
+
+function post($key) {
+  return isset($_POST[$key]) ? trim((string)$_POST[$key]) : '';
+}
+
+$to = 'dsyoon@ncue.net';
+
+$name = post('name');
+$email = post('email');
+$subject = post('subject');
+$message = post('message');
+
+if (mb_strlen($name) < 2) fail('이름을 입력해주세요.');
+if (!filter_var($email, FILTER_VALIDATE_EMAIL)) fail('이메일을 올바르게 입력해주세요.');
+if (mb_strlen($subject) < 4) fail('제목을 입력해주세요.');
+if (mb_strlen($message) < 10) fail('내용을 조금 더 자세히 입력해주세요(10자 이상).');
+
+// Basic sanitization
+$safe_name = str_replace(array("\r", "\n"), ' ', strip_tags($name));
+$safe_subject = str_replace(array("\r", "\n"), ' ', strip_tags($subject));
+$safe_email = filter_var($email, FILTER_SANITIZE_EMAIL);
+$safe_message = trim(strip_tags($message));
+
+$ip = isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '';
+$ua = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
+$ts = date('Y-m-d H:i:s');
+
+$mail_subject = '[수지 AI·데이터 아카데미 문의] ' . $safe_subject;
+$mail_body =
+  "수지 AI·데이터 아카데미 문의가 도착했습니다.\n\n" .
+  "이름: {$safe_name}\n" .
+  "이메일: {$safe_email}\n" .
+  "제목: {$safe_subject}\n" .
+  "시간: {$ts}\n" .
+  "IP: {$ip}\n" .
+  "User-Agent: {$ua}\n\n" .
+  "내용:\n" .
+  "{$safe_message}\n";
+
+// Many hosts reject arbitrary From. Use a neutral From and set Reply-To to the user.
+$from = 'no-reply@ncue.net';
+$headers = array();
+$headers[] = 'MIME-Version: 1.0';
+$headers[] = 'Content-Type: text/plain; charset=UTF-8';
+$headers[] = 'From: 수지 AI·데이터 아카데미 <' . $from . '>';
+$headers[] = 'Reply-To: ' . $safe_email;
+$headers[] = 'X-Mailer: PHP/' . phpversion();
+
+$ok = mail($to, $mail_subject, $mail_body, implode("\r\n", $headers));
+
+if ($ok) {
+  echo "OK";
+  exit;
+}
+
+http_response_code(500);
+echo "메일 전송에 실패했습니다. 서버 메일 설정(sendmail/SMTP)을 확인해주세요.";
+exit;
+
+

contactform/readme.txt

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+Fully working PHP/AJAX contact form is avaialbe in the pro version.
+You can buy it from: https://bootstrapmade.com/buy/?theme=Moderna