Enable /Disable PHP modules: freeBSD

Checking for installed php modules and packages# php -m

Search extension# ee /usr/local/etc/php.ini

1.
To enable /disable PHP modules# cd /usr/ports/converters/php73-mbstring && make install clean
# cd /usr/ports/converters/php73-mbstring && make deinstall

To search extension,
# ee /usr/local/etc/php.ini

;extension=mbstring
Remove the semicolon to enable this extention

mbstring configuration starts with:
[mbstring]

2.

To find the default extension directory:The extention directory location dependes on the OS thus you need to find it manually.

# cat /usr/local/bin/php-config
Find this line.
extension_dir='/usr/local/lib/php/20180731'

In php.ini find this line 

;extension_dir = "./"
Changed it to 

extension_dir = "/usr/local/lib/php/20180731/"

;When the extension library to load is not located in the default extension
; directory, You may specify an absolute path to the library file:
; extension=/path/to/extension/mysqli.so

Simple call to the apachectl command for a graceful restart is needed to load the PHP module:
# apachectl graceful

Or to hard restart,

# service apache24 restart