How to write php login

How to write php login?

1. First create a login form. (This is all HTML, no explanation).

<form action="" method="post">
<input type="text" name="username" /><br>
<input type="password" name="pwd" /><br />
<input type="submit" name="login" value="登录" />
</form>

2. Start writing the PHP processing program, and start writing on top of the code you just wrote:

$username = "admin"; //要登录的账号
$pwd = "123456"; //要使用的密码
if ($username==$_POST[username]&&$pwd==$_POST[pwd]){
echo "登陆成功！";
}else{
echo "账号或密码错误";
exit();
}

In fact, this is a very simple user system.

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