====== Error Log Fills Up Disk ======

The server's main ''stderr.log'' is growing very fast and is filling up the disk space rapidly, like so: 

  34G /var/log/apache2/stderr.log.2019_01_07
  6.1G /var/log/apache2/stderr.log.2019_01_07.01
  6.3G /var/log/apache2/stderr.log.2019_01_07.02
  6.0G /var/log/apache2/stderr.log.2019_01_07.03
  5.7G /var/log/apache2/stderr.log.2019_01_07.04
  6.2G /var/log/apache2/stderr.log.2019_01_08
  6.0G /var/log/apache2/stderr.log.2019_01_08.01
  6.2G /var/log/apache2/stderr.log.2019_01_08.02
  6.2G /var/log/apache2/stderr.log.2019_01_08.03
  36G /var/log/apache2/stderr.log.2019_01_08.04
  6.2G /var/log/apache2/stderr.log.2019_01_08.05
  5.8G /var/log/apache2/stderr.log.2019_01_08.06
  5.9G /var/log/apache2/stderr.log.2019_01_09

When you check the contents of ''stderr.log'' you see many PHP warning messages:

  PHP Warning: next() expects parameter 1 to be array, null given in /home// /wp-includes/class-wp-hook.php on line 291
  PHP Warning: current() expects parameter 1 to be array, null given in /home// /wp-includes/class-wp-hook.php on line 275
  PHP Warning: Invalid argument supplied for foreach() in /home// /wp-includes/class-wp-hook.php on line 277
  PHP Warning: next() expects parameter 1 to be array, null given in /home// /wp-includes/class-wp-hook.php on line 291

The warnings are from different shared hosting users but all are logged to the main server ''stderr.log'' log. 

We believe the excessive logging is due to a PHP change. The PHP engine generates a lot of error/warning messages. So, how do you stop this?

===== Upgrade and Disable Entirely ===== 

Upgrade to the latest LSWS build (version 5.3.5 or above), navigate to **LSWS Admin Panel > Server > Log** and set **Enable stderr Log** to ''No''. This should stop writing error output to ''stderr.log''.

===== Disable only for PHP =====

If you only want to stop PHP-related error reporting in ''stderr.log'', you can leave **Enable stderr Log** set to ''Yes'', and then add a special environment variable to LSPHP external application configuration:

  LSAPI_STDERR_LOG=/dev/null

This will discard PHP-generated warning messages.