I know that magento 1.9.4 will support for php7.2. Php7.2 security support will end by this year nov 2020(https://www.php.net/supported-versions.php).

For considering security aspect, planning to run magento 1.9.4 using php 7.4.

can we run magento 1.9.4 using php 7.4?

Please let me know (magento expert*).

Thanks,