how to change memory_limit in php.ini

how to change memory_limit in php.ini ?

With CWP this is very simple:
go to menu --> PHP Settings --> PHP Simple Editor

here you can edit sa view mostly used settings from php.ini file.

Mostly used settings are:
memory_limit
upload_max_filesize
post_max_size
max_execution_time
display_errors
date.timezone  (change php time zone)