当我刷新网页时，评论在文件上被保存两次 [英] comments are being saved twice on a file when i refresh the webpage
问题描述
我将评论保存在一个文件中并在网页上打印内容。
，但问题是当我刷新网页时，最后一条评论显示两次。
这里是我的代码：
i正在写评论块网站。
我将评论保存在一个文件中，并在网页上打印内容
。
但问题是当我刷新网页时，最后一个
评论显示两次。
这里是我的代码：
< html>
< body>
< form method =GET>
< textarea rows =15cols =50name =comments>
< / textarea>
< input type =submitvalue =submit>
< / form>
< / body>
< / html>如果（！（$ _ GET [注释] == null））{
$ b<？php
b $ b $ comments =Anonymous said：< br>。$ _ GET
[comments]。< br>< br> ;
$ file_comments = fopen（comments.txt，a）;
fwrite（$ file_comments，$ comments）;
fclose（$ file_comments）;
$ _GET [comments] = null;
$ comments = null;
}
$ comments = file_get_contents（comments.txt）;
echo $ comments;
$ _GET [comments] = null;
$ comments = null;
？>
以下是快速解决方案：
-
在您的表单被保存或出现错误后，将它们重定向到同一页面，但使用
GETuri中的变量，如process.php？action = save。使用标题功能进行重定向。 您还使用cookie保存提交表单的人员的IP并限制他在一段时间内能够提交该表格再次。
i am writing a comment block in my website. i save the comment in a file and print the contents on the webpage. but the problem is when i refresh the webpage the last comment gets displayed twice.
Here's my code: i am writing a comment block in my website. i save the comment in a file and print the contents on
the webpage. but the problem is when i refresh the webpage the last
comment gets displayed twice.
Here's my code:
<html>
<body>
<form method="GET">
<textarea rows="15" cols="50" name="comments" >
</textarea>
<input type="submit" value="submit" >
</form>
</body>
</html>
<?php
if(!($_GET["comments"]==null)){
$comments = "Anonymous said:<br>".$_GET
["comments"]."<br><br><br><br>";
$file_comments = fopen("comments.txt","a");
fwrite($file_comments,$comments);
fclose($file_comments);
$_GET["comments"] = null;
$comments = null;
}
$comments = file_get_contents("comments.txt");
echo $comments;
$_GET["comments"] = null;
$comments = null;
?>
Here are quick solutions:
After your form has been saved or if it has an error, redirect them to the same page but with
GETvariables in the uri likeprocess.php?action=save. Use header function for redirection.You also use cookies to save the IP of the person who submits the form and restrict him for certain period to be able to submit the form again.
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