Error logging to a file beside the php script in error doesnt work

Jean-Michel Simard

• February 12, 2024 15:44
• Edited

Hi there, banging my head a bit here about creating an error file besides the php scripts that generated the errors.

For now i have error logged in files at the path /home/myuser/logs, but i can't seem to fin how to make it work with error_log. I have access to whm and cpanel and the php.ini (in whm) is using error_log = error_log as it's default. Where else could i look to change values or see if it's not overwritten?

Edit: I must add that i have a lot of sub-domains set up and use CGI for multi-php setup

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  cPRex Jurassic Moderator

  • February 12, 2024 17:15

  Hey there!  I would create a local PHP Info page (https://support.cpanel.net/hc/en-us/articles/360052760494-How-to-use-a-PHPInfo-file-for-troubleshooting-PHP-issues) and see what the error_log value is there, as that will show the actual loaded value of PHP for that specific domain/subdomain on the webserver.

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  Jean-Michel Simard

  • February 12, 2024 17:21

  Thanks for the fast answer! indeed the error_log path is set to a direct path for the subdomain

  /home/user/logs/subdomain.php.error.log

  Is there a place i can modify the value?, ther must be an overwrite somewhere since the global ini directive in whm user error_log

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  cPRex Jurassic Moderator

  • February 12, 2024 17:23

  There sure is - there's a few different options presented here, depending on your configuration: https://support.cpanel.net/hc/en-us/articles/360050860534-How-do-I-set-the-PHP-error-log-location

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  Jean-Michel Simard

  • February 12, 2024 17:32
  • Edited

  Great, found the place (PHP-FPM INI Settings) , but is says : Path relative to: /home/user/logs under the textfiled, doest it mean i cannot have error_log file directly beside the script that cause it?

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  cPRex Jurassic Moderator

  • February 12, 2024 21:52

  With PHP-FPM, no, there isn't a way to get it in a different area.  The way PHP-FPM handles data is through pools, and those pools run as the cPanel user, and that's the area they will log their data too.

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  Jean-Michel Simard

  • February 13, 2024 18:16

  Ah bummer, thanks for the answer though.

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  cPRex Jurassic Moderator

  • February 13, 2024 19:35

  Sure thing!

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  rbairwell

  • February 13, 2024 20:00

  (coulds and mights included quite a bit below as I haven't tested these myself but do recall doing something like this back in PHP5 days...)

  You could add at the start of your PHP files:

  ini_set("log_errors", 1);
  ini_set("error_log", "/home/user/logs/subdomain.php.error.log");

  which will set the error_log location for that script.

  You might be able to set "error_log=/home/user/logs/subdomain.php.error.log" in a .user.ini file to set things on a directory level, but this isn't something I've tried.

  Alternatively, you could change the php-fpm settings to include an auto_prepend_file setting such as:

  php_value[auto_prepend_file]=/home/user/logger.php

  (which will force PHP to include that file every time it is run) and create /home/user/logger.php to set the error_log location based on the request_uri. However, this isn't something for the faint hearted/inexperienced PHP devleoper.

  See also https://stackoverflow.com/questions/18711422/error-log-in-the-same-directory-as-included-files , https://maxchadwick.xyz/blog/setting-a-php-value-in-php-fpm and https://stackoverflow.com/questions/14107845/new-relic-wordpress-ignore-wp-cron-php all of which might help point you in the right direction

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  Jean-Michel Simard

  • February 14, 2024 14:58

  well, that is great info there, thanks a bunch!

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