PHP表单写入文本文件-防止重新提交POST重定向
[英]php form writing to text file - prevent POST redirect re-submission
问题描述
The code below is a php form that writes to a txt file and outputs the results on the same page. 
下面的代码是php形式，可写入txt文件并在同一页面上输出结果。
However when I refresh the page POST data is automatically added again - and I want to prevent this. 但是，当我刷新页面时，POST数据会自动再次添加-我想防止这种情况。 I understand I should redirect users to another page, but how do I do that if my results are on the same page and I want them to stay on the same page: 我知道我应该将用户重定向到另一页，但是如果我的结果在同一页上并且希望他们留在同一页上，该怎么办：
<!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>
<title>Score Watch</title>
</head>
<body>
<p>
<form id="form1" name="form1" method="post" action="">
<label>Date:
<input name="date" class="datepicker" id="date" required type="text"
data-hint="" value="<?php echo date('d/m/Y'); ?>" />
</label>
<br>
<label>Score:
<input type="text" name="name" id="name" />
</label>
<label>
<input type="submit" name="submit" id="submit" value="Submit" />
</label>
</form>
</p>
<?php
$date = $_POST["date"];
$name = $_POST["name"];
$posts = file_get_contents("posts.txt");
$posts = "$date $name<br>" . $posts;
file_put_contents("posts.txt", $posts);
echo $posts;
?>
</body>
</html>
I've seen the header('Location') tactic, but I can't use it since i output data on the same page? 我已经看到header('Location')策略，但是由于我在同一页面上输出数据，所以无法使用它吗？
2 个解决方案
解决方案1
3 已采纳 2014-01-24 14:10:02
ADD THIS TO TOP OF YOU PAGE 将此添加到您的页面顶部
<?php
if(isset($_POST['name'],$_POST['date'])){
// Text we want to add
$posts = "{$_POST['date']} {$_POST['name']}<br>";
// Add data to top of the file
file_put_contents("posts.txt", $posts . file_get_contents('posts.txt') );
// Redirect user to same page
header('Location: ' . $_SERVER['REQUEST_URI']);
}
?>
Change your body a little bit Replace this: 稍微改变一下身体替换此：
<?php
$date = $_POST["date"];
$name = $_POST["name"];
$posts = file_get_contents("posts.txt");
$posts = "$date $name<br>" . $posts;
file_put_contents("posts.txt", $posts);
echo $posts;
?>
with this: 有了这个：
<?php
// Print contents of posts.txt
echo file_get_contents("posts.txt");
?>
解决方案2
1 2014-01-24 14:09:02
You can use the same page, if you don't want to use another page. 如果您不想使用其他页面，则可以使用同一页面。 The data should be transmitted either via GET or SESSION 数据应通过GET或SESSION传输
To prevent cyclic redirection, you should put in condition your redirection. 为了防止循环重定向，您应该使重定向处于条件状态。
I would suggest: 我会建议：
At the top of the page 在页面顶部
<?php session_start(); ?>
then 然后
<?php
if (isset($_POST['date'])) {
$date = $_POST["date"];
$name = $_POST["name"];
$posts = file_get_contents("posts.txt");
$posts = "$date $name<br>" . $posts;
file_put_contents("posts.txt", $posts);
$_SESSION['posts'] = $posts;
header("Location: samepage.php?success=1");
}
?>
<?php
if (isset($_GET['success'], $_SESSION['posts'])) {
echo $_SESSION['posts']
}
?>
The redirection also should be before the HTML, to prevent sent headers issue. 重定向也应该在HTML之前，以防止发送标头出现问题。
Only the last block can be printed inside the <p> 's because it's actual output. 因为<p>是实际输出，所以只能在<p>内打印最后一个块。
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