Hello Arun Maharjan,
Use the below steps to avoid notices in your OpenEMR application:
Step 1: Open the file /Applications/MAMP/bin/php/php{PHP VERSION}/conf/php.ini. Click phpInfo on your start screen of MAMP to see the {PHP VERSION}.
Step 2: Find the line with error_reporting and replace it with error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT & ~E_NOTICE
Step 3: Save the file and restart your MAMP server
If you are asking if it’s safe to turn off the warnings, it is. The only time you should be concerned is when there is a fatal error, which cannot be ignored. In that case, there generally is a malfunction which forces a user to fix the fatal error.
It’s advisable to make the other changes in .php.ini to save yourself difficulties in the future.