AddHandler application/x-httpd-php73 .php .php5 code example
Example: change php version using htaccess
AddHandler application/x-httpd-php54 .php
AddHandler application/x-httpd-php7 .php
AddHandler application/x-httpd-php71 .php
AddHandler application/x-httpd-php54 .php
AddHandler application/x-httpd-php7 .php
AddHandler application/x-httpd-php71 .php