I have a php page:
我有一个php页面:
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST'){
echo $_POST["username"];
echo $_POST["password"];
echo $_POST["confirm_password"];
echo $_POST["email"];
}
?>
<!DOCTYPE html>
<html>
<head>
<title>WordCat Signups</title>
<script type="text/javascript" src="signup_validate.js"></script>
</head>
<body>
<form action="" method="POST">
Username:<br><input type="text" name="username" placeholder="Username" onkeyup="check_username();"><span id="check_username"></span><br>
Password:<br><input type="password" name="password" placeholder="Password" onkeyup="check_password();"><span id="check_password"></span><br>
Confirm Password:<br><input type="password" name="confirm_password" placeholder="Confirm Password" onkeyup="check_passwords();"><span id="check_passwords"></span><br>
Email:<br><input type="email" name="email" placeholder="Email" onkeyup="check_email();"><span id="check_email"></span><br>
<input type="submit" name="submit" value="Signup"></br>
</form>
</body>
</html>
<?php
if(
