change default php1_mode

[IXPLANET]

Hi .. if i change default php1_mode to php 7.3 and before was have php 5.6 as default or have php 7.2 before , did all user will force to used 7.3 or still used previous php version 5.6 / 7.2 ?

if will force change to 7.3 how to keep default setting to user have php version like before ex : php 5.6 or php 7.2 . and for new user will have php 7.3 as default.