Question

如何在登录表单中添加登录表单验证错误，错误消息不会出现在loginform中

＆＃13;

<form  action="test.php" method="POST" >
                    <div class="logintable ">
                        <table  class="applyfont" style="border: 1px solid lightseagreen">
                            <tbody>
                                <tr id="login1">
                                    <td class="applyfontbold"><b>Login </b></td>
                                </tr>
                                <tr>
                                    <td style="padding-right:10px;">
                                        <input type="text" name="name" value="" placeholder="Username or Email" id="uname">
                                        <span class="error">* <?php echo $nameErr;?></span>
                                    </td>
                                </tr>
                                <tr> 
                                    <td>
                                        <input type="password" name="password" value="" placeholder="Password" id="password">
                                        <span class="error">* <?php echo $passeErr;?></span>
                                    </td>
                                </tr>
                                <tr> 
                                    <td>
                                        <p class="submit"><input type="submit" name="save" value="Submit"> </p>

                                    </td>
                                </tr>
                                <tr>
                                    <td>
                                        <div class="login-help applyfontlighter">
                                            <p>Forgot your password? <span id="footer"><u style="color:red;"><a href="#">Click here to reset it.</a></u></span></p>
                                        </div>
                                        <p id="new"><button type="button" class="btn btn-default btn-xs" >New Registers</button></p>
                                    </td>
                                </tr>
                            </tbody> 
                        </table>
                    </div>
                </form>

<?php
$x = "typepass";
if (isset($_POST['save'])) {
    if (empty($_POST['name'])) {
        print "Name is required";
    } else {
        $name = $_POST['name'];
    }
    if (empty($_POST['password'])) {
        print "<br> password is required";
    } elseif ($_POST['password'] !== $x) {
        print "password doesn't match";
    } else {
        $password = $_POST['password'];
    }
   print "Username :" . " " . $name . "<br>" . "Password :" . " " . $password;
}
?>

＆＃13;

＆＃13; 我想在中创建错误消息在输入字段（用户名和密码两个字段）之后显示错误。在php

中

Answer 1

如果你不想像你说的那样想使用AJAX，那么这两个文件都必须是PHP才能工作。你需要使用SESSIONS。这样做（我删除了不必要的代码）：

<强> page.php文件

<?php
session_start();
?>
<form action="submit.php" method="POST">

    <input type="text" name="name" value="" placeholder="Username or Email" id="uname">
    <?php if (!empty($_SESSION['name_error'])) { ?>
        <span class="error">* <?= $_SESSION['name_error'] ?></span>
    <?php } ?>

    <input type="password" name="password" value="" placeholder="Password" id="password">
    <?php if (!empty($_SESSION['pass_error'])) { ?>
        <span class="error">* <?= $_SESSION['pass_error'] ?></span>
    <?php } ?>

    <input type="submit" name="save" value="Submit">

</form>
<?php
session_destroy();
?>

<强> submit.php

<?php
session_start();

$x = "typepass";
if (isset($_POST['save'])) {

    $errors = 0;

    if (empty($_POST['name'])) {
        $_SESSION['name_error'] = "Name is Required";
        $errors++;
    }

    if (empty($_POST['password'])) {
        $_SESSION['pass_error'] = "password is required";
        $errors++;
    } else if ($_POST['password'] !== $x) {
        $_SESSION['pass_error'] = "password doesn't match";
        $errors++;
    }

    if ($errors > 0) {
        //go back to prev page
        header("Location:" . $_SERVER['HTTP_REFERER']);
    } else {
        //do your logic
    }

}
?>

Answer 2

你需要添加一个段落标记，并在收到jquery的错误后将错误信息添加到其中，你可以按照本教程

http://phppot.com/jquery/jquery-form-validation-with-tooltip/

Answer 3

我不是说这段代码是标准格式。使用$ _SESSION可以通过调用session_start（）来初始化会话，而不会调用你无法存储会话变量。

I like to create error message in after the under the input field是CSS问题那么你需要修改css，因为你想显示

<强> HTML

<?php 
session_start();
?>
<style type="text/css">
  .error {
        width : 100%; /* this is example giving*/
        float : left; /*you can modify as you like*/
         }
</style>
<form  action="test.php" method="POST" >
                <div class="logintable ">
                    <table  class="applyfont" style="border: 1px solid lightseagreen">
                        <tbody>
                            <tr id="login1">
                                <td class="applyfontbold"><b>Login </b></td>
                            </tr>
                            <tr>
                                <td style="padding-right:10px;">
                                    <input type="text" name="name" value="" placeholder="Username or Email" id="uname">
                                    <span class="error">* <?php echo isset($_SESSION['nameErr'])?$_SESSION['nameErr']:'';?></span>
                                </td>
                            </tr>
                            <tr> 
                                <td>
                                    <input type="password" name="password" value="" placeholder="Password" id="password">
                                    <span class="error">* <?php echo isset($_SESSION['passwordErr'])?$_SESSION['passwordErr']:'';?></span>
                                </td>
                            </tr>
                            <tr> 
                                <td>
                                    <p class="submit"><input type="submit" name="save" value="Submit"> </p>

                                </td>
                            </tr>
                            <tr>
                                <td>
                                    <div class="login-help applyfontlighter">
                                        <p>Forgot your password? <span id="footer"><u style="color:red;"><a href="#">Click here to reset it.</a></u></span></p>
                                    </div>
                                    <p id="new"><button type="button" class="btn btn-default btn-xs" >New Registers</button></p>
                                </td>
                            </tr>
                        </tbody> 
                    </table>
                </div>
            </form>

<强> test.php的

<?php
session_start();
$x = "typepass";
if (isset($_POST['save'])) {
if (empty($_POST['name'])) {
    $_SESSION['nameErr'] = "Name is required";
    $status = false;
} else {
    isset($_SESSION['nameErr']) ? session_unset($_SESSION['nameErr']):null;
    $name = $_POST['name'];
    $status = true;
}
if (empty($_POST['password'])) {
    $_SESSION['passwordErr'] = " password is required";
    $status = false;
} elseif ($_POST['password'] !== $x) {      
    $_SESSION['passwordErr'] = "password doesn't match";
    $status = false;
} else {
    isset($_SESSION['passwordErr'])? session_unset($_SESSION['passwordErr']):null;
    $password = $_POST['password'];
    $status = true;
}
if($status === false){
    header("Location:login.php"); //rediret to login if error
}
print "Username :" . " " . $name . "<br>" . "Password :" . " " . $password;
}
?>

我试图让错误验证在表单登录表单中以红色显示

3 个答案: