title: PHP doesn't see bcmath
body: <p>I've got two versions of PHP on a server(Centos 6.8) - 5.6 and 7.1
  My Nginx using php7.1, which is not default PHP interpreter.
  After some struggle with yum i've installed php71-php-bcmath. Yum didn't enable it by default, so i made a symlink</p>
  
  <pre><code>ln -s /opt/php71/etc/mods-available/bcmath.ini /opt/php71/etc/php.d/bcmath.ini
  </code></pre>
  
  <p><code>/opt/php71/bin/php-config --extension-dir</code> shows that extension path is
  /opt/php71/lib/php/modules</p>
  
  <p>There IS bcmath.so</p>
  
  <pre><code>/opt/php71/bin/php -i | grep bcmath
  </code></pre>
  
  <p>show that php is cofigured with flag <code>'--enable-bcmath=shared'</code> </p>
  
  <p>But when i'm trying to use function from bcmath - there is error </p>
  
  <pre><code>Call to undefined function PhpAmqpLib\Wire\bcadd() 
  </code></pre>
  
  <p>I've already made nginx and php-fpm restart a thousand times, how can i enable this wicked extension?</p>