如您所知，我是 php 新手，我的會話有問題。重繪 頁面時會話丟失。我有一個簡單的按鈕，可以在明暗模式之間切換，它可以作業，我將值存盤到會話值中。我可以列印該值并看到它正在被存盤，但是在重繪 或重新訪問時，模式切換到相反的模式，然后在重繪 /重新訪問時，狀態實際上被保存了。我試圖搜索我的問題，但我找不到任何東西，我要睡覺了，所以我想我不妨在此期間發帖。我不確定我錯過了什么，可能很明顯，但我感謝您的幫助。順便說一句，我只能為此使用 PHP。
<?php
session_start();
//header('Refresh: 3000; url=index.php');
echo "" . $_SESSION['color'] . "";
echo "<body style = 'background-color: " . $_SESSION['color'] . ";'>";
?>
<!DOCTYPE html>
<html lang = "en-US">
<head>
<link rel="stylesheet" href="index.css">
<title>
Web Technologies
</title>
</head>
<body>
<?php session_start();
include_once "templateFunctions.php";
if (isset($_POST['dark'])) {
if (!isset($_SESSION['color'])) {
//session_register('color');
$_SESSION['color'] = "rgb(54, 53, 53)";
echo "<body style = 'background-color: " . $_SESSION['color'] . ";'>";
} else {
if ($_SESSION['color'] == "rgb(54, 53, 53)") {
$_SESSION['color'] = "white";
echo "<body style = 'background-color: " . $_SESSION['color'] . ";'>";
} else {
$_SESSION['color'] = "rgb(54, 53, 53)";
echo "<body style = 'background-color: " . $_SESSION['color'] . ";'>";
}
}
}
/*$color = "rgb(48, 48, 48)";
setcookie('color', $color, time() 10, '/');
$_COOKIE['color'] = [$color];
echo "<p>'$cookie'</p>";
echo "<body style = 'background-color: $cookie;'>";
else {
$_SESSION['color'] = "rgb(54, 53, 53)";
echo "<body style = 'background-color: " . $_SESSION['color'] . ";'>";
}
*/
?>
<div class = "header">
<div class = "title" >
<h1>Jimbo Fimbo</h1><h2><u>Software Stuff</u></h2></th>
</div>
<div class = "img">
<img id = "img1" src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTci5Mqm2mgMe_9KfJR0TqMEd-A_wtmqq69cru0wed7OEQF6jVAYycqCY_KzWV0o3hIVYs&usqp=CAU" alt="https://i.ytimg.com/vi/KEkrWRHCDQU/maxresdefault.jpg">
</div>
</div>
<hr style = "margin-bottom: 20px;">
<div class = "colgroup">
<div class="column1">
<h3 style = "text-align: center;">Menu</h3><hr style = "color:white;">
<ul style = "padding-left:20px; font-size: 25px;">
<li><a href="https://github.com">GitHub<br></a></li>
<li><a href="courses.html">Courses<br></a></li>
<li><a href="https://google.com">School<br></a></li>
</ul>
</div>
<div class="column2">
<h1>About Me</h1>
<img id = "img2"src="https://i.ytimg.com/vi/KEkrWRHCDQU/maxresdefault.jpg">
<p>
Heres some lorem ipsum! <br> Lorem ipsum dolor sit amet. Reprehenderit sunt est quia
necessitatibus est eius quis. Est dolor adipisci et dolor molestiae hic vitae expedita eum inventore quam aut mollitia natus. Qui quia
dolor aut totam Quis qui expedita repudiandae non quam magni et enim ipsa qui consequatur omnis. Ea incidunt debitis est nemo nesciunt
eum quia rerum eum recusandae sunt nam maiores saepe. Hic omnis dolores ab deserunt vero cum fugiat explicabo vel perferendis numquam.
Sed unde voluptatibus quo aliquid iure rem accusamus voluptatum aut maxime adipisci id molestiae voluptatem? In quia necessitatibus et
provident id nobis eius ea enim voluptatem in aliquam voluptas ut similique facilis. Et porro ipsam eos excepturi voluptatem non ullam sint.
</p>
<p>Stuff goes here </p>
</div>
<div class="column3">
<p style = "text-align: center;">Enrolled Courses</p>
<hr style = "color:white;">
<ol style = "padding-left: 20px; font-size: 25px;">
<li>CS-3753</li>
<li>CS-4393</li>
<li>CS-4413</li>
<li>CS-4423</li>
<li>CS-4843</li>
</ol>
<form action="index.php" method = "post" accept-charset=utf-8 >
<input type="submit" name = "dark" id ="submit" value = "Dark Mode">
</form>
</div>
</div>
<footer class="foot">
Copyright 2022, Jimbo Fimbo
</footer>
</body>
</html>
我期待我上面提到的。我查看了代碼無濟于事，我嘗試使用另一個會話變數來保存顏色更改，我嘗試使用上述方法將會話保存到路徑，并且我在互聯網上查看了類似的問題，但我我想我不擅長谷歌搜索，因為這看起來很簡單。
uj5u.com熱心網友回復：
如果你想擺脫頁面重繪 時會話變數會“切換”的問題，其中一種方法是將更改顏色部分與顯示部分分開，因此可以將表單提交目標設定為“更改顏色。 php"，這將在更改會話變數時觸發頁面重定向到 index.php：
索引.php
<?php
session_start();
/// initalize the color to be white if no color session variable
if (!isset($_SESSION['color'])) {
$_SESSION['color'] = "white";
}
echo "<body style = 'background-color: " . $_SESSION['color'] . ";'>";
?>
/// other HTML code
<form action="changecolor.php" method = "post" accept-charset=utf-8 >
<input type="submit" name = "dark" id ="submit" value = "Change Color Mode">
</form>
改變顏色.php
<?php session_start();
if (isset($_POST['dark'])) {
if (!isset($_SESSION['color'])) {
$_SESSION['color'] = "rgb(54, 53, 53)";
} else {
if ($_SESSION['color'] == "rgb(54, 53, 53)") {
$_SESSION['color'] = "white";
} else {
$_SESSION['color'] = "rgb(54, 53, 53)";
}
}
header("Location: index.php");
}
?>
轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/525281.html
標籤：phphtml会议刷新