Question

我想记住点击提交按钮后特定输入的值？目的是如果在用户注册帐户期间遇到错误，如电子邮件存在或密码不匹配，我想保留名称，年龄等值，此时我的代码，我该怎么办？任何帮助或建议？感谢

<?php
        session_start();
        $errflag = false;
        $errmsg = array();
        if(isset($_SESSION['errmsg'])&&is_array($_SESSION['errmsg'])&&count($_SESSION['errmsg'])>0){
            foreach($_SESSION['errmsg'] as $msg){
                echo $msg;
            }
            unset($_SESSION['errmsg']);
        }
        ?>
        <form method="post">
            <table>
            <tr>
                <td>Last Name:</td><td><input id="txtfield" type="text" name="lname" autofocus="autofocus" required="required"></td>
            </tr>
            <tr>
                <td>First Name:</td><td><input id="txtfield" type="text" name="fname" required="required"></td>
            </tr>
            <tr>
                <td>E-mail:</td><td><input id="txtfield" type="email" name="email" required="required"></td>
            </tr>
            <tr>
                <td>Password:</td><td><input id="txtfield" type="password" name="pass" pattern=".{6,}" required="required"></td>
            </tr>
            <tr>
                <td>Re-type:</td><td><input id="txtfield" type="password" name="rpass" pattern=".{6,}" required="required"></td>
            </tr>
            <tr>
                <td></td><td><input id="btn" type="submit" name="register" value="Register"></td>
            </tr>
            </table>
        </form>
        <?php
        include 'functions/functions.php';
        if(isset($_POST['register'])){
            $result=ValidateEmail($_POST['email']);
            if($result){
                $errmsg[] = '<p id="error"><img src="img/error.png" alt="error">This email address is already in use.</p>';
                $errflag = true;
            }
            if($_POST['pass']!=$_POST['rpass']){
                $errmsg[] = '<p id="error"><img src="img/error.png" alt="error">Passwords does not match.</p>';
                $errflag = true;
            }
            if($errflag){
                session_regenerate_id();
                $_SESSION['errmsg'] = $errmsg;
                session_write_close();
                $errflag = false;
                header('location: register.php');
                exit();
            }
            else {
                $user = array('lname'=>$_POST['lname'],'fname'=>$_POST['fname'],'email'=>$_POST['email'],'pass'=>$_POST['pass']);
                RegisterUser($user);
                session_regenerate_id();
                $errmsg[] = '<p id="success"><img src="img/success.png" alt="success">Your account is now active. You may now login.</p>';
                $_SESSION['errmsg'] = $errmsg;
                session_write_close();
                header('location: index.php');
                exit();
            }
        }
        ?>

Answer 1

使用ajax / javascript检查密码是否匹配或用户名是否已存在。这样你就可以在不实际更改页面的情况下查询数据库。

所以你填充的字段仍然存在。这是w3schools的小example

Answer 2

 <form method="post">
     <input id="txtfield" type="text" name="lname" autofocus="autofocus" required="required" Value=<?php $lname ?>/>

已经回复到同一页面。你现在可以做的是：

 $lname = ""; //and all the other fields
 $fname = "";
 if ($_POST['lname'] == "")
 {
    $fname = $_POST['fname'];//and all the other fields
    //put all the variables back into the form and display an error text
 }
 else
 {
    //Lets do the whole form processing and submit here
 }

换句话说，使用空白变量为输入字段设置所有值。如果发生错误，请将所有这些变量设置为其原始值。

Answer 3

根据我的理解，如果提交错误或丢失，您希望提交的变量在表单中再次显示。

用这个代替HTML代码，应该这样做：

    <form method="post">
        <table>
        <tr>
            <td>Last Name:</td><td><input id="txtfield" type="text" name="lname" value="<?=$_POST['lname'];?>" autofocus="autofocus" required="required"></td>
        </tr>
        <tr>
            <td>First Name:</td><td><input id="txtfield" type="text" name="fname" value="<?=$_POST['fname'];?>" required="required"></td>
        </tr>
        <tr>
            <td>E-mail:</td><td><input id="txtfield" type="email" name="email" value="<?=$_POST['email'];?>" required="required"></td>
        </tr>
        <tr>
            <td>Password:</td><td><input id="txtfield" type="password" name="pass" pattern=".{6,}" required="required"></td>
        </tr>
        <tr>
            <td>Re-type:</td><td><input id="txtfield" type="password" name="rpass" pattern=".{6,}" required="required"></td>
        </tr>
        <tr>
            <td></td><td><input id="btn" type="submit" name="register" value="Register"></td>
        </tr>
        </table>
    </form>

我想记住点击提交按钮后特定输入的值？

3 个答案: