PhP登录表单不起作用，但注册效果很好，我一开始怀疑标题位置，但似乎不是问题

我正在制作一个帐户表单，在一个网站的单个页面上都有登录和注册表单，注册表单与数据库一起工作很好，但我无法登录。

下面是uaccount.php (my forms)的代码


<form action="uregistration.php" method="post">
    <!--SIGN UP FORM HERE-->
    <h1>Create Account</h1>
    <input type="text" id="firstname" name="firstname" placeholder="First Name" required>
    <input type="text" id="lastname" name="lastname" placeholder="Last Name" required>
    <input type="email" id="email" name ="email" placeholder="Email" required>
    <input type="password" id="password" name="password" placeholder="Password" required>
    <input type="date" id="birthdate" name="birthdate" placeholder="Birthdate" required>
    <input type="text" id="contact" name="contact" placeholder="Contact No." maxlength = "11" required>
    <select type= "text" id="gender" name="gender" placeholder="Gender" required>
        <option selected disabled> Select your gender </option>
        <option value="male">Male</option>
        <option value="female">Female</option>
        <option value="others">Others</option>
    </select>
<button type="submit" id="register" name= "register">Sign Up</button>
</form>
</div>
<a href="index.php"> <i class="fa fa-times-circle-o"></i> </a>
<form action= "uvalidation.php" method="post">
    <!--SIGN IN FORM HERE-->
    <h1> Sign in </h1>
    <input type="email" id="email" name ="email" placeholder="Email" required>
    <input type="password" id="password" name="password" placeholder="Password" required>
    <a href ="#">Forgot your Password?</a>
    <button type="submit" id="login" name= "login">Sign In</button>
</form>
</div>
</body>
</html>

下面是uregistration.php(注册表单数据库连接)的代码

<?php
session_start();
header('Location: uaccount.php');
$con = mysqli_connect('localhost', 'root', '');
mysqli_select_db($con, 'castro_rentals');
$firstname = $_POST['firstname'];
$lastname = $_POST['lastname'];
$email = $_POST['email'];
$password = sha1($_POST['password']);
$birthdate = $_POST['birthdate'];
$contact = $_POST['contact'];
$gender = $_POST['gender'];
$s = " SELECT * FROM user WHERE email = '$email'";
$result = mysqli_query($con, $s);
$num = mysqli_num_rows($result);
if ($num == 1) {
    echo "Email already taken!";
}else{
    $reg = " insert into user
                            (firstname, lastname, email, password, birthdate, 
                            contact, gender) 
                    VALUES ('$firstname' , '$lastname' , '$email' , 
                            '$password' , '$birthdate' , '$contact' , 
                            '$gender')";
    mysqli_query($con, $reg);
    echo " Registration Successful!";
}

下面是uvalidate .php(登录表单数据库连接)的代码

<?php
session_start();
$con = mysqli_connect('localhost', 'root', '');
mysqli_select_db($con, 'castro_rentals');
$email = $_POST['email'];
$password = sha1($_POST['password']);
$s = " SELECT * FROM user WHERE email = '$email' AND password = '$password'";
$result = mysqli_query($con, $s);
$num = mysqli_num_rows($result);
if ($num == 1) {
    header('Location: index.php');
}else{
    header('Location: uaccount.php');
}

最后，这里是index.php的代码(我想在验证登录后重定向我的页面)

<?php
session_start();
?>
<!DOCTYPE html>
<html>
<head>
    
    <title> Home | Castro Rentals </title>
    
</head>
<body>
    Welcome!!
</body>
</html>

我试过了

位置中大写字母L
删除标题内的空白位置:
也删除了关闭?>php结束标签

我修好了!我删除了uvalidation.php上的sha(1) !我忘记删除了因为我从uregistration。php

复制粘贴了它我在(uvalidation.php)之前的代码:$email = $_POST['email']; $password = sha1($_POST['password']);

我的代码后(uvalidation.php):$email = $_POST['email']; $password = ($_POST['password']);

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