Question

如何验证表单值？

执行我的代码

在输入创建用户中填写“aaaa”之类的用户。然后单击“检查用户”按钮
在输入中填写姓名和姓氏
点击“确定”按钮

为什么checkform wiill会显示“请输入用户名”。 ??

test_1.php

    <?PHP
    session_start();
    session_destroy();
?>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.6.1.min.js"></script>
<script type="text/javascript" src="http://www.jeasyui.com/easyui/jquery.easyui.min.js"></script>
    <script type="text/javascript">
        $(function(){
            $('#ff').form({
                success:function(data){
                    $.messager.alert('Info', data, 'info');
                }
            });
        });
    </script>
</head>

<form id="ff" name="form_check_user" method="post" action="test_2.php" ENCTYPE = "multipart/form-data">
Create User : <input type="text" name="user"/>
    <input type="submit" name="check_user" value="check user" />
</form>

<div style=" border-top: 1px solid #eee; width: 39%;"></div>
<br>

<form name="finished" method="post" action="" ENCTYPE = "multipart/form-data" onsubmit="return checkform(this);">
    Name : <input type="text" name="name"/>
    Last Name : <input type="text" name="last_name"/>
<br>
    <input type="submit" name="submit" value="OK" />
</form>


    <script language="JavaScript" type="text/javascript">
    <!--
    function checkform ( form )
    {
      if (form.name.value == "") {
        alert( "Please enter your name." );
        form.name.focus();
        return false ;
      }
      if (form.last_name.value == "") {
        alert( "Please enter your last name." );
        form.last_name.focus();
        return false ;
      }
      if ("<?php echo $_SESSION[check];?>"  == "") {
        alert( "Please enter User name." );
        form.last_name.focus();
        return false ;
      }
    return true ;
    }
    //-->
    </script>

test_2.php

<?PHP
    session_start();
     $_SESSION["check"] = $_POST['user'];
?>

Answer 1

这是因为您正在访问会话变量的未定义常量，如此..

if ("<?php echo $_SESSION[check];?>"  == "") { // See it is just check , you need to wrap it around quotes.

应该是

if ("<?php echo $_SESSION['check'];?>"  == "") {

使用checkform会话验证表单？

1 个答案: