Why is the php-bcmath extension not being installed?

Question

PHP

Good day, I'm trying to raise a container on the docker, but for some reason the php-bcmath extension is not installed.

The DockerFile itself

FROM ubuntu:18.04

# Устанавливаем время
ENV TZ=Asia/Almaty
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

# Создаем рабочую папку
RUN mkdir /var/www
WORKDIR /var/www


# Обновляем APT
RUN apt-get update -y

# Устанавливаем системные зависимости
RUN apt-get install -y nano git mc net-tools cron curl software-properties-common


# Устанавливаем PHP7
RUN ln -sf /var/log/php7.3-fpm.log /dev/stdout
RUN add-apt-repository ppa:ondrej/php -y
RUN apt-get update -y
RUN apt-get install -y php7.3 php7.3-fpm php7.3-pgsql php7.3-curl php7.3-dom php7.3-gd php7.3-mbstring php7.3-zip php-soap php-dompdf <b>php-bcmath</b> php7.3-ldap
RUN sed -i -e "s/pid =.*/pid = \/var\/run\/php7.3-fpm.pid/" /etc/php/7.3/fpm/php-fpm.conf
RUN sed -i -e "s/error_log =.*/error_log = \/proc\/self\/fd\/2/" /etc/php/7.3/fpm/php-fpm.conf
RUN sed -i -e "s/;daemonize\s*=\s*yes/daemonize = no/g" /etc/php/7.3/fpm/php-fpm.conf
RUN sed -i "s/listen = .*/listen = 9000/" /etc/php/7.3/fpm/pool.d/www.conf
RUN sed -i "s/;catch_workers_output = .*/catch_workers_output = yes/" /etc/php/7.3/fpm/pool.d/www.conf

# Устанавливаем composer
RUN php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" && php composer-setup.php --install-dir=/usr/bin --filename=composer && chmod +x /usr/bin/composer && php -r "unlink('composer-setup.php');"

# Устанавливаем npm
RUN apt-get install -y npm

ENTRYPOINT php-fpm7.3
CMD ["-F", "-R"]

EXPOSE 9000

It is not in the list of extensions


Although if you try to install through the terminal, it says that it is already installed

Answer 1

Because you need to install the php7.3-bcmath package . On your screenshot, you can see that the module version for PHP 7.4 is installed: php-bcmath is already the newest version (2: 7.4 +73+ubuntu18.04.1+deb.sury.org+1)

Answer 2

RUN docker-php-ext-enable bcmath
PS Or not, now I looked - the build is custom, not off., where there is "docker-php-ext-enable". But in any case, I think it should be included in php.ini simply.