Logging

• Currently the only logs for CodeIngiter apps in BSP are the Apache/Nginx logs. Logs from the apps themselves, from log_message are not kept as config[log_threshold] is set to 0 (zero) in BSP. This means you don't get any code-level errors, like:
  ERROR - 2019-10-01 12:21:29 --> Severity: Warning --> fgetcsv() expects parameter 1 to be resource, boolean given /home/vcap/app/htdocs/application/helpers/csv_helper.php 44 ERROR - 2019-10-01 12:21:29 --> Severity: Warning --> Invalid argument supplied for foreach() /home/vcap/app/htdocs/application/helpers/csv_helper.php 48 ERROR - 2019-10-01 12:21:29 --> Severity: Notice --> Undefined variable: row_new /home/vcap/app/htdocs/application/helpers/csv_helper.php 52
• Most PHP web apps will treat STDOUT as what gets passed to the web server and back to the client, which is why the log_message and write_log functions of CodeIgniter write to a specific path in application/logs. If we want these logs:
  • update system/libraries/log.php forlog_message to write to STDOUT, then
  • We should be able to use the fpm.d tricks at PHP stdout not working with httpd or nginix. cloudfoundry/php-buildpack#256 and/or FPM worker output not going to logs cloudfoundry/php-buildpack#202 to set FPM_CATCH_WORKERS_OUTPUT to yes.