从管理面板修改并注销不会保存图像

Question

我主要想在admin帐户中进行修改，每当我退出admin帐户时，图像都不会保存，这给我带来了未定义的索引错误。 这是我的主页php代码：

<?php $src = $_SESSION['firstimgsrc'];echo "<img id='first' src='$src'>";?><!-- Direct link 1st champion -->
        <?php $src1 = $_SESSION['secondimgsrc'];echo "<img id='second' src='$src1'>"; ?><!-- Direct link 2nd champion -->
        <?php $src2 = $_SESSION['thirdimgsrc'];echo "<img id='third' src='$src2'>";?> <!-- Direct link 3rd champion -->
        <?php $src3 = $_SESSION['forthimgsrc'];echo "<img id='forth' style='border-right: 0px;' src='$src3'>"; ?> <!-- Direct link 4th champion -->

这是管理面板的php代码：

    <?php 
if(isset($_POST['submit'])) {
    session_start();
    $firstimgsrc = $_POST['firstimgsrc'];   
    if ($firstimgsrc == "") {
        $_SESSION['firstimgsrc'] = $jk;
    } else {
        $_SESSION['firstimgsrc'] = $firstimgsrc;
        $jk = $_SESSION['firstimgsrc'];
    }
    $secondimgsrc = $_POST['secondimgsrc'];
    if ($secondimgsrc == "") {
        $_SESSION['secondimgsrc'] = $jk1; } else {
        $_SESSION['secondimgsrc'] = $secondimgsrc;
        $jk1 = $_SESSION['secondimgsrc'];

    }
    $thirdimgsrc = $_POST['thirdimgsrc'];

    if ($thirdimgsrc == "") {
        $_SESSION['thirdimgsrc'] = $jk2;
    } else {
    $_SESSION['thirdimgsrc'] = $thirdimgsrc;
    $jk2 = $_SESSION['thirdimgsrc'];
}
    $forthimgsrc = $_POST['forthimgsrc'];
    if ($forthimgsrc == "") {
        $_SESSION['forthimgsrc'] = $jk3;

    } else {
        $_SESSION['forthimgsrc'] = $forthimgsrc;
        $jk3 = $_SESSION['forthimgsrc'];
    }
    header("Location: ../egamingtv.php");
}

?>

Answer 1

工作，我只是在注销页面中使用了unset而不是session_destroy