To customize memory limit of your host, perform the following steps:
1 – Open cPanel (yourdomain/cpanel).
2 – Click on (Select PHP Version) from Software section.
3 – Click on the PHP Version drop-down control to select from the available versions of PHP installed on the server.
4 – Click on Set as current button to activate any changes.
5 – Click on Switch To PHP Options.
6 – Edit any of features on this page.
7 – Click on Save.