change error log output format: ini_set('error_append_string', 'string') and ini_set('error_prepend_string', 'string') does nothing

Question

This is what I tell php to do:

<?php
error_reporting(E_ALL);
ini_set('display_errors', '0');
ini_set('log_errors', 1);
ini_set('error_log', 'errors.log');
ini_set('error_append_string', 'APP');
ini_set('error_prepend_string', 'PRE');
?>

Hoping that I would get all errors reported in one file, with "PRE" before the message and "APP" after the message. (My goal is to make PRE and APP into /n /r or something...)

But my error reporting log looks like this:

[14-May-2013 00:16:26] PHP Notice: Undefined variable: nonexistentvariable in /home/www/dir/index.php on line 14[14-May-2013 00:16:28] PHP Notice: Undefined variable: nonexistentvariable in /home/www/dir/index.php on line 14

No PRE, no APP...

How do I get it in there, so that my error reporting file will have each error on a newline, rather than a loooong string of errors that's not helpful to me?

EDIT: So I noticed that with ini_set('display_errors', '1'); the "APP" and "PRE" strings are displayed on the page, in the error message.

That means I really need to find out where I can change the format for how php logs the errors. For example this whole timestamp thing - where is that specified?

EDIT: It is not possible to change the way php logs errors, you have to make your own error handler.

ANSWER: To truly achieve what I was going to, I asked a different question (to be more precise). How to change the way PHP writes errors in the error log file?

hek2mgl · Accepted Answer · 2013-05-13 22:45:27Z

5

As the documentation says nothing to that, I have tested your example. I realized that error_append/prepend_string only works for displayed but not logged errors

My goal is to make PRE and APP into /n /r or something...

You should use a regex for that. Should be possible, as every log messages starts with nearly same prefix. Will prepare one....

answered May 13, 2013 at 22:45

hek2mgl

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12 Comments

oliver_siegel Over a year ago

as for your realization: Yes, I had the same results. The log message is not effected by append_string.

oliver_siegel Over a year ago

Are you suggesting to rewrite the error log file and add newlines after each page load or something like that?

oliver_siegel Over a year ago

and do what with the expression?

hek2mgl Over a year ago

I have currently something unfinished like this: '/^\[.*?\] PHP (Notice|Parse error):/m' .. Of course the list Notice|Parse error must be extended. But it looks like finding the right regex can be tricky here (but it is possible)... maybe google finds something as well

hek2mgl Over a year ago

I expect that there are tools for that (don't actually having one in mind). But check this for example, maybe it enlights you :) : serverfault.com/questions/53894/colorize-monitoring-of-logs

|

Michal Hatak · Accepted Answer · 2013-05-13 22:30:17Z

-1

check phpinfo(); after ini_sets

answered May 13, 2013 at 22:30

Michal Hatak

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2 Comments

oliver_siegel Over a year ago

it updated php info correctly... I assume the problem is with "display_erors" vs. "log_errors" - meaning it seems to me as if log_errors doesn't utilize the ap/pre-pend_string

Shardj Over a year ago

Just a complete non-answer

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