To set the error_reporting parameter value, use the General PHP Settings form found at "Web Server Settings → PHP → Configuration → General ".
Enable the Report all errors flag to include the E_ALL value in error_reporting. In this case the Select flags to ignore in error_reporting field will become available, with which you can add exclusion of some levels of error output (they will be excluded by means of logical operators & ~) to the parameter value
When you save the form, an entry of the form will be added to the php.ini:
error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT.
Disable the Remport all errors flag, and no E_ALL value will be added to error_reporting. The Select flags for error output field will become available, with which you can add error level flags to the parameter value (they will be enabled with the | logical operator)
When you save the form, a record of the form will be added to php.ini
error_reporting = E_ERROR | E_NOTICE