Question

就像标题所说，我对我的验证php有疑问。它只是一个简单的登录php，如果用户输入了错误的信息，将执行验证表单，表示它将在五秒倒计时后返回到上一个登录页面。但是，如果用户输入正确的用户名和密码，它将只在验证php上显示欢迎文本。但是，每当我运行程序时，它都会执行欢迎文本和倒计时，无论输入的信息是对还是错。

这是我的第一个php：

<!DOCTYPE html PUBLIC"-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <style>
        body {
        margin:0; 
        font-family: Calibri}

        .style1 {
        color: #FFFFFF}

    </style>
</head>
<body>
    <h1>Getting Input from USER</h1><h2>EXAMPLE 1</h2>
    <form method="post" action="validatea.php">
    <table width="200" border="0" cellspacing="0" cellpadding="5">
        <tr>
            <th bgcolor="#006699" scope="row"><span class="style1">Username</span></th>
            <td><label>
            <input type="text" name="txtUsername" id="txtUsername" required="required"/>
            </label></td>
        </tr>

        <tr>
            <th bgcolor="#006699" scope="row"><span class="style1">Password</span></th>
            <td><label>
            <input type="password" name="txtPassword" id="txtPassword" required="required"/>
            </label></td>
        </tr>

        <tr>
            <th colspan="2" scope="row"><div align="right">
            <input type="reset" value="Clear"/>
            <input type="submit" value="Login"/>
            </div></th>
        </tr>
        </table>
        </form>
        <hr/>


</body>
</html>

这是验证php：

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>

    <script>
        var ctr=5;
        function countdown(){
            window.document.getElementById("cnt").innerHTML=ctr;
            ctr--;
            if (ctr<0) window.location="samplea.php";
            setTimeout("countdown()", 1000);
        }
        </script>

</head>

<body>

<?php
    if(isset($_POST["txtUsername"])){
        $uname="user";$psw="hello";
            if($uname==$_POST["txtUsername"] && $psw==$_POST["txtPassword"]){
                echo "<h2>Welcome " .$_POST["txtUsername"]."!</h2>";
            else{
                echo"Username and Password is invalid.<br/><br/>";
                echo'This will redirect to login form in <label id="cnt"></label>seconds...';
                echo'<script> countdown();</script>';
            }
        }
    }
?>

</body>
</html>

Answer 1

您错过了第二个IF中的}

<?php
    if(isset($_POST["txtUsername"])){
        $uname="user";$psw="hello";
        if($uname==$_POST["txtUsername"] && $psw==$_POST["txtPassword"]){
                echo "<h2>Welcome " .$_POST["txtUsername"]."!</h2>";
        }else{ //Forgot to close if }
                echo"Username and Password is invalid.<br/><br/>";
                echo'This will redirect to login form in <label id="cnt"></label>seconds...';
                echo'<script> countdown();</script>';
        }
    }
?>

Answer 2

如果在验证php中你没有关闭你的第二个！关闭它，它将正常工作

PHP validate同时执行IF语句和ELSE语句

2 个答案: