發送onclick事件到另一個頁面

Question

我有一個登錄頁面，我想做的是單擊按鈕時的登錄信息，登錄信息很好，它進入了index.php並隱藏了日志div並顯示了nova div。 我的代碼中有某些內容，但是它不起作用。 這是我的代碼。

login.php

<?php
session_start();
if(isset($_SESSION['username'])) {
echo '<script type="text/javascript"> window.location="index2.php";</script>';
}

if(isset($_POST['submit'])) {
include('connection.php');

$user = mysql_real_escape_string($_POST['username']);
$pass = md5($_POST['password']);
if($user && $pass) {
$sql="SELECT * FROM korisnici WHERE username = '" . $user . "' and password = '" . $pass . "'";
if (!$q=mysql_query($sql))
{
echo "<p>Error</p>" . mysql_query();
die();
}
if (mysql_num_rows($q)==0)
{
echo '<script type="text/javascript">alert("Incorrect username and password");      window.location="login.php";</script>';

} 
else {
$_SESSION['username'] = $_POST['username'];
header('Location: index.php');
}
} else {
    echo "<script language='javascript'>alert('Fill out both fields!')</script>";
}
}
?>


<form action="login.php" method="POST">
Username: <input type="text" name="username" >
Password:&nbsp <input type="password" name="password" >
<input type="submit" id="submit" value="LOGIN" name="submit" class="button" onclick="showCommentDiv()"/>
</form>

app.js

function showCommentDiv() {
document.getElementById('nova').style.display = "block";
document.getElementById('log').style.display = "none";
}

index.php

<div id="log">
<form action="login.php">
<input type="submit" id="logdugme" value="LOGIN/REGISTRACIJA" name="logdugme" class="button"/>
</form> 
</div>

<div id="nova">
<form action="#" method="POST">
    <colgroup>
        <col widht="25%" style="vertical-align:top;"/>
        <col widht="75%" style="vertical-align:top;"/>
    </colgroup>
    <table>
        <tr>
            <td><label for="comment" class="ime" >Comment :</label></td>
            <td><textarea name="comment" rows="10" cols="50" maxlength="190" class="ime"></textarea></td>
        </tr>
        <tr><td colspan="2"><input type="submit" class="dugme" name="submit" value="Leave comment"></td></tr>
    </table>
</form>

    </div>

Answer 1

代替 ：

echo '<script type="text/javascript"> window.location="index2.php";</script>';

嘗試把：

header("Location: index2.php");

另外，嘗試添加以下說明：

在PHP代碼的開頭（第一個標記）：

ob_start();

在PHP代碼的末尾（最后一個標記）；

ob_flush();

Answer 2

根據您的登錄會話顯示所需的內容。 這是基本示例的index.php文件：

<?php
session_start();
if (!isset($_SESSION['username']))
{
?>
    <div id="log">
        <form action="login.php">
            <input type="submit" id="logdugme" value="LOGIN/REGISTRACIJA" name="logdugme" class="button"/>
        </form> 
    </div>
<?php
}
else
{
?>
<div id="nova">
    <form action="#" method="POST">
        <colgroup>
            <col widht="25%" style="vertical-align:top;"/>
            <col widht="75%" style="vertical-align:top;"/>
        </colgroup>
        <table>
            <tr>
                <td><label for="comment" class="ime" >Comment :</label></td>
                <td><textarea name="comment" rows="10" cols="50" maxlength="190" class="ime"></textarea></td>
            </tr>
            <tr><td colspan="2"><input type="submit" class="dugme" name="submit" value="Leave comment"></td></tr>
        </table>
    </form>
</div>
<?php
}
?>