title: PHP | "The requested PHP extension bcmath is missing from your system."
body: <p>Greetings fellow developers,</p>
  
  <p>I am trying to use composer for a PHP project of mine on a development server I recently booted up and for some reason I am unable to. I successfully installed composer, however, when I try to run the <em>require</em> command I get the following error:</p>
  
  <pre><code>root@webserver:/var/mypersonal/index# composer require php-amqplib/php-amqplib
  PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/php_openssl.dll' - /usr/lib/php/20151012/php_openssl.dll: cannot open shared object file: No such file or directory in Unknown on line 0
  Do not run Composer as root/super user! See https://getcomposer.org/root for details
  Using version ^2.6 for php-amqplib/php-amqplib
  ./composer.json has been created
  Loading composer repositories with package information
  Updating dependencies (including require-dev)
  Your requirements could not be resolved to an installable set of packages.
  
    Problem 1
      - php-amqplib/php-amqplib v2.6.3 requires ext-bcmath * -&gt; the requested PHP extension bcmath is missing from your system.
      - php-amqplib/php-amqplib v2.6.2 requires ext-bcmath * -&gt; the requested PHP extension bcmath is missing from your system.
      - php-amqplib/php-amqplib v2.6.1 requires ext-bcmath * -&gt; the requested PHP extension bcmath is missing from your system.
      - php-amqplib/php-amqplib v2.6.0 requires ext-bcmath * -&gt; the requested PHP extension bcmath is missing from your system.
      - Installation request for php-amqplib/php-amqplib ^2.6 -&gt; satisfiable by php-amqplib/php-amqplib[v2.6.0, v2.6.1, v2.6.2, v2.6.3].
  
    To enable extensions, verify that they are enabled in your .ini files:
      - /etc/php/7.0/cli/php.ini
      - /etc/php/7.0/cli/conf.d/10-mysqlnd.ini
      - /etc/php/7.0/cli/conf.d/10-opcache.ini
      - /etc/php/7.0/cli/conf.d/10-pdo.ini
      - /etc/php/7.0/cli/conf.d/20-calendar.ini
      - /etc/php/7.0/cli/conf.d/20-ctype.ini
      - /etc/php/7.0/cli/conf.d/20-exif.ini
      - /etc/php/7.0/cli/conf.d/20-fileinfo.ini
      - /etc/php/7.0/cli/conf.d/20-ftp.ini
      - /etc/php/7.0/cli/conf.d/20-gettext.ini
      - /etc/php/7.0/cli/conf.d/20-iconv.ini
      - /etc/php/7.0/cli/conf.d/20-json.ini
      - /etc/php/7.0/cli/conf.d/20-mysqli.ini
      - /etc/php/7.0/cli/conf.d/20-pdo_mysql.ini
      - /etc/php/7.0/cli/conf.d/20-phar.ini
      - /etc/php/7.0/cli/conf.d/20-posix.ini
      - /etc/php/7.0/cli/conf.d/20-readline.ini
      - /etc/php/7.0/cli/conf.d/20-shmop.ini
      - /etc/php/7.0/cli/conf.d/20-sockets.ini
      - /etc/php/7.0/cli/conf.d/20-sysvmsg.ini
      - /etc/php/7.0/cli/conf.d/20-sysvsem.ini
      - /etc/php/7.0/cli/conf.d/20-sysvshm.ini
      - /etc/php/7.0/cli/conf.d/20-tokenizer.ini
    You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
  
  Installation failed, deleting ./composer.json.
  </code></pre>
  
  <p>I'm assuming it's something to do with the PHP warning I recieve right when running the <em>composer require</em> command but no google search results lead me to the correct direction.</p>
  
  <p>Additionally, I have provided my <em>/etc/php/7.0/cli/php.ini</em> file incase of an error in that file.</p>
  
  <p><a href="https://gist.github.com/anonymous/bc5bac59d684cbf575cef931ef36daf6" rel="noreferrer">https://gist.github.com/anonymous/bc5bac59d684cbf575cef931ef36daf6</a> <strong><em>(I couldn't include the file in this post due to the character limit on posts.)</em></strong></p>
  
  <p>Thank you.</p>