PHP

# check to see if a module is installed/available, examples:
    
    php --modules | grep curl
    php --modules | grep intl
    php --modules | grep json
    php --modules | grep mbstring
    php --modules | grep xml

# search for modules

    sudo apt search php | grep php

# installing php modules

    sudo apt -y install php-curl
    sudo apt -y install php-mbstring
    sudo apt -y install php-xml