a.html

<form method="POST" action="process.php">
  이름: <input type="text" name="name" required><br>
  이메일: <input type="email" name="email" required><br>
  나이: <input type="number" name="age" min="1" max="120"><br>
  성별: 
  <input type="radio" name="gender" value="남성"> 남성
  <input type="radio" name="gender" value="여성"> 여성<br>
  <button type="submit">회원가입</button>
</form>