使用php写入日志文件 [英] Using php to write to a log file

问题描述

首先，我对php非常非常非常非常不好，所以对不起这个问题 我有一个要在其中记录一些调试数据的应用程序 通过我的项目，我向我的网站发出了一个Web请求，将信息存储在 $ msg然后我想将数据写入站点上的我的logfile.log中. 我首先使用fopen fwrite fclose，但听说file_put_contents会更好 特别是因为我极有可能会有几个用户试图一次写入文件. 这是代码:

First of I am very very very very bad with php so sorry for this question I have an application in which i would like to log some debug data and through my project i make a webrequest to my site storing the information in $msg i then want to write the data to my logfile.log on the site. i first used fopen fwrite fclose, but heard that file_put_contents would be better especially as i very likely will have several users trying to write to the file at once. Here's the code:

$msg = $_GET['w'];
$logfile= 'logfile.log';
echo file_put_contents($logfile,$msg, FILE_APPEND | LOCK_EX);

但是您可能会猜到代码对我没有任何帮助 我让它与fopen fwrite fclose一起工作 但我想将每个用户添加到新行.

But as you might guess the code does nothing for me i got it working with fopen fwrite fclose but i wanted to add each user to a new line.

如果有什么聪明的大脑可以帮助我，我将不胜感激.

If any smart brain out there would help me I would appreciate it a ton.

致谢.

杰伊 这就是我尝试应用它的方式(在第一行中打开php) 由于复制/粘贴错误，已从代码中删除了标签".

@Jay This is how i tried applying it (opening php on the first line) removed 'tag' from code due to a copy/paste error.

error_reporting(E_ALL); ini_set('display_errors', 1)
$msg = $_GET['w'];
$logfile= 'logfile.log';
echo file_put_contents($logfile,$msg, FILE_APPEND | LOCK_EX);

推荐答案

为什么不只使用error_log()?在message_type设置为3(第二个参数)的情况下，消息将被写入第三个参数中指定的文件:

Why not just use error_log()? With the message_type set to 3 (second parameter) the message will be written the the file specified in the third parameter:

$message = $_GET['w'];
$logfile = 'logfile.log';

// Debug: A line for verifying I have the message
echo "Writing message '$message' to logfile<br>";

error_log($message."\n", 3, $logfile);

// Debug: read back the log file to verify thatthe line has been written
readfile($logfile);

请注意，邮件中附加的newline是error_log()不能为您完成的操作.

Note the newline appended to the message as error_log() doesn't do this for you.

还请注意，必须设置权限以允许Web服务器写入目标文件.无论使用error_log()还是file_put_contents()

Note also that permissions must be set to allow the web server to write to the target file. This is true whether using error_log() or file_put_contents()

PHP参考位于此处

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