Can you log php errors to multiple files?

Question

Is it possible to send the same error to a global php error log in /var/log/php_errors as well as send the same error to a local error log in /var/www/mysite/php_errors?

On our staging server, I tail the log file, and a lot of wordpress stuff as well as some big ugly print_r's will come through from other developers. I'd like to have a global error file to see if there is anything breaking server wide from time to time, as well as separate out my local errors so I can follow them better if I'm only interested in one site at the moment.

This sucks, error_log=log1;log2 doesn't work either.

Pacerier
– Pacerier

2016-04-15 13:57:04 +00:00
Commented Apr 15, 2016 at 13:57 — Pacerier
– Pacerier, Commented Apr 15, 2016 at 13:57

user1237595 · Accepted Answer · 2012-03-19 21:42:41Z

3

Use set_error_handler and make a custom error function with as much logging as you like.

answered Mar 19, 2012 at 21:42

user1237595

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3 Comments

yellottyellott Over a year ago

"The following error types cannot be handled with a user defined function: E_ERROR, ..." Good idea, but I cause way too many fatal errors.

user1237595 Over a year ago

For those you can use register_shutdown_function (php.net/manual/en/function.register-shutdown-function.php), would also make sense to use set_custom_handler (php.net/manual/en/function.set-exception-handler.php) too for any uncaught exceptions

majick Over a year ago

There is a class available here that does what @Ing suggests: stackoverflow.com/a/30637618/5240159

Mark Baker · Accepted Answer · 2012-03-19 21:35:16Z

2

If you use a library such as log4php then you can configure a wide range of logging options, including writing to multiple files, sending emails, etc based on log type.

answered Mar 19, 2012 at 21:35

Mark Baker

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Comments

jasonlfunk · Accepted Answer · 2012-03-19 21:33:07Z

1

Not that I am aware of. However, you could use the error_prepend_string ini setting and prepend all of your error logs with something. And then when you tail your log files you can grep on whatever you set and it will show you only messages from that site (so long as you choose something fairly unique.)

http://www.php.net/manual/en/errorfunc.configuration.php#ini.error-prepend-string

answered Mar 19, 2012 at 21:33

jasonlfunk

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2 Comments

yellottyellott Over a year ago

Can we set this in a .htaccess file? This is probably the simplest solution. I need to brush up on my grep-pipe-fu.

majick Over a year ago

error_prepend_string works for error display output but not for logging.

Shawinder Sekhon · Accepted Answer · 2019-03-19 20:27:54Z

0

You can use this code in a shared file and call appropriate logging function:

function log_to_file_1($msg){
   ini_set("log_errors", 1); 
   ini_set("error_log", "/tmp/file_1.log");
   ini_set('log_errors_max_len', 1024); // Logging file size
   error_log($msg);
}

function log_to_file_2($msg){
   ini_set("log_errors", 1); 
   ini_set("error_log", "/tmp/file_2.log");
   ini_set('log_errors_max_len', 1024); // Logging file size
   error_log($msg);
}

You can also use a single logging function with filename as a parameter:

function mysql_error_log($filename, $msg){
  ini_set("log_errors", 1); 
  ini_set("error_log", "/tmp/$filename");
  ini_set('log_errors_max_len', 1024); // Logging file size
  error_log($msg);
}

edited Mar 19, 2019 at 20:27

answered Mar 19, 2019 at 20:22

Shawinder Sekhon

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