通过PHP服务器端提交数据

我对表单为什么不发送然后被重定向到index.php页面感到困惑。我对PHP非常陌生，并尝试使用User对象。这是我到目前为止所拥有的

<main>
        <header>
            <h1>Create New Account</h1>
        </header>            

        <section id="formEntry">
            <form id="createacct" name="createacct" action="CreateAccount.php" method="post" onsubmit="return validateForm()">
                <fieldset>
                    <legend>Enter your information</legend>
                    <table>
                        <tr>
                            <td class="fieldName">First Name</td>
                            <td class="inputField"><input type="text" id="firstname" name="firstname" form="createacct" size="30" maxlength="50" onchange="firstNameUpdated()"></td>                                
                            <td id="firstnamemsg"></td>
                        </tr>
                        <tr>
                            <td class="fieldName">Last Name</td>
                            <td class="inputField"><input type="text" id="lastname" name="lastname" form="createacct" size="30" maxlength="50" onchange="lastNameUpdated()"></td>
                            <td id="lastnamemsg"></td>
                        </tr>
                        <tr>
                            <td class="fieldName">Email</td>
                            <td class="inputField"><input type="email" id="emailAddress" name="emailAddress" form="createacct" size="30" maxlength="50" onchange="emailUpdated()"></td>
                            <td id="emailmsg"></td>
                        </tr>
                        <tr>
                            <td class="fieldName">Select a username</td>
                            <td class="inputField"><input type="text" id="username" name="username" form="createacct" size="30" maxlength="50" onchange="usernameUpdated()"></td>
                            <td id="usernamemsg"></td>
                        </tr>
                        <tr>
                            <td class="fieldName">Enter your password</td>
                            <td class="inputField"><input type="password" id="password" name="password" form="createacct" size="30" maxlength="50" onchange="pwdUpdated()"></td>
                            <td id="passwordmsg"></td>
                        </tr>
                        <tr>
                            <td class="fieldName">Confirm password</td>
                            <td class="inputField"><input type="password" id="confirmpwd" name="confirmpwd" form="createacct" size="30" maxlength="50" onchange="confirmUpdated()"></td>
                            <td id="confirmpwdmsg"></td>
                        </tr>
                        <tr>
                            <td id="saveMsg"></td>
                            <td colspan="2" class="submitButton">                                    
                                <input type="reset" value="Clear all fields" class="styleButton" onclick="clearFields(this)">
                                <input type="submit" value="Create New Account" class="styleButton" onclick="return createNewAccount()">                                    
                            </td>
                        </tr>
                    </table>                        
                </fieldset>
            </form>                
        </section> 

        <?php 
            include 'CreateAccount.php';

            $user = new User();

            $user->first = trim($_POST["firstname"]);
            $user->last = trim($_POST["lastname"]);
            $user->emailaddress = trim($_POST["emailAddress"]);
            $user->username = trim($_POST["username"]);
            $user->password = trim($_POST["password"]);
            $user->confirmpwd = trim($_POST["confirmpwd"]);

            $isValid = $user->validate();
        ?>

    </main>

创建新帐户
输入您的信息
名字
姓
电子邮件
选择用户名
输入您的密码
确认密码

以及PHP文件（CreateAccount.PHP）：

我做错了什么？每次我提交时，它都会将我重定向到CreateAccount.php并显示为空白。谢谢你的帮助
 
我让它工作起来了。我做的都是错的，事实上，我花了好几个小时来解决错误，并将代码四处移动

<?php

# In your CreateAccount.php,
# update your code like this

Class User {
    public $first;
    public $last;
    public $emailaddress;
    public $username;
    public $password;
    public $confirmpwd;

    // validation function
    function validate() {
        if (($this->first != null || $this->first != '') &&
            ($this->last != null || $this->last != '') &&
            ($this->emailaddress != null || $this->emailaddress != '') &&
            ($this->username != null || $this->username != '') &&
            ($this->password != null || $this->password != '') &&
            ($this->confirmpwd != null || $this->confirmpwd != '') &&
            ($this->password === $this->confirmpwd)) {
            storeData($this->first, $this->last, $this->emailaddress, $this->username, $this->password);
            header('Location: TestPage.php');
        } else {
            header('Location: CreateNewAccount.php');
        }
    }

}

#notice that the exit code is been removed and hopefully this should work..

事实证明，我不需要PHP网页中的PHP代码，因为我没有类对象。下面是我所做的-代码片段：

<?php

class User {
    public $first = '';
    public $last = '';
    public $emailaddress = '';
    public $username = '';
    public $password = '';
    public $confirmpwd = '';

    function validate() {
        if ($this->first === null || $this->first === '') {
            return false;
        }

        if ($this->last === null || $this->first === '') {
            return false;
        }

        if ($this->emailaddress === null || $this->emailaddress === '') {
            return false;
        }

        if ($this->username === null || $this->username === '') {
            return false;
        }

        if ($this->password === null || $this->password === '') {
            return false;
        }

        if ($this->confirmpwd === null || $this->confirmpwd === '') {
            return false;
        }

        if ($this->password !== $this->confirmpwd) {
            return false;
        }

        return true;
    }
}



请注意，我将变量从PHP网页移动到了PHP文件（CreateAccount.PHP），问题得到了解决，并且没有得到向我抛出的未定义索引错误

关于我在原始代码中使用的exit（），它可以使用exit（），也可以不使用exit（），尽管这不是必需的，但出于方便的目的
 
storeData（）
的作用是什么？它的函数在哪里？请删除exit（）并重试，因为您在创建用户对象后退出，将永远无法访问validate（），页面将为空。facepalming我自己。是的，那个出口在这里就可以了。您的脚本正在退出，没有处理任何内容您正在将数据发布到CreateAccount.php，它只有一个类定义，没有其他内容。没有调用函数，您希望发生什么？也许您想将表单的操作更改为“”，以便它发布到您实际使用用户类的当前页面？当您复制和粘贴操作代码时，您必须添加对更改内容的解释，以及这将解决问题的原因。另外，如果你也阅读了其他人发布的答案和评论，这也会很方便。是的，当然，但我的PHPSTORM IDE通常在我发布代码之前测试代码，所以仅供参考，答案是肯定的，我已经测试过它，它工作正常。我正在使用NetBeans IDE并删除exit（），就像我上面所说的那样，没有做到这一点。它只是显示了错误列表。
<?php

class User {
    public $first = '';
    public $last = '';
    public $emailaddress = '';
    public $username = '';
    public $password = '';
    public $confirmpwd = '';

    function validate() {
        if ($this->first === null || $this->first === '') {
            return false;
        }

        if ($this->last === null || $this->first === '') {
            return false;
        }

        if ($this->emailaddress === null || $this->emailaddress === '') {
            return false;
        }

        if ($this->username === null || $this->username === '') {
            return false;
        }

        if ($this->password === null || $this->password === '') {
            return false;
        }

        if ($this->confirmpwd === null || $this->confirmpwd === '') {
            return false;
        }

        if ($this->password !== $this->confirmpwd) {
            return false;
        }

        return true;
    }
}

<?php

include 'User.php';

$user = new User();

$user->first = trim($_POST["firstname"]);
$user->last = trim($_POST["lastname"]);
$user->emailaddress = trim($_POST["emailAddress"]);
$user->username = trim($_POST["username"]);
$user->password = trim($_POST["password"]);
$user->confirmpwd = trim($_POST["confirmpwd"]);

$isValid = $user->validate();

if ($isValid) {
    storeData($first, $last, $emailaddress, $username, $password); //ignore the line 
    header('Location: index.php');
} else {
    header('Location: CreateNewAccount.php');
}

?>