在文本文件中创建或写入/附加 [英] Create or write/append in text file

问题描述

我有一个网站，每次用户登录或注销时，我都会将其保存到文本文件中.

I have a website that every time a user logs in or logs out I save it to a text file.

如果代码不存在，我的代码将无法添加数据或创建文本文件.这是示例代码

My code doesn't work in appending data or creating a text file if it does not exist.. Here is the sample code

$myfile = fopen("logs.txt", "wr") or die("Unable to open file!");
$txt = "user id date";
fwrite($myfile, $txt);
fclose($myfile);

在我再次打开它之后，它似乎没有追加到下一行.

It seems it does not append to next line after I open it again.

另外，我认为在2个用户同时登录的情况下也会出现错误，这会影响打开文本文件并随后保存吗?

Also I think it would also have an error in a situation when 2 users login at the same time, would it affect opening the text file and saving it afterwards?

推荐答案

尝试如下操作:

 $txt = "user id date";
 $myfile = file_put_contents('logs.txt', $txt.PHP_EOL , FILE_APPEND | LOCK_EX);

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