Sometimes, we need to debug PHP. Hence, we need to enable display_errors or disable them for security reasons. You can do this using the CloudLinux Selector to enable or disable PHP's display_errors in cPanel.
1. Log in to your cPanel account.
2. In the Software section, click on Select PHP Version.
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3.Under the Account Global Settings, go to the Optionstab.

Note: If it shows an error related to the Native PHP version, change to a non-Native PHP version first.
4. For enabling display_errors, tick mark it. For disabling it, uncheck it.

The message will show that the option is enabled or disabled.