title: Docker php:7.4.4-fpm-alpine Call to undefined function mysqli_init()
body: <p>Mysqli functions do not work for me, example:</p>
  
  <pre><code>&lt;?php
     $con = mysqli_init();
  ?&gt;
  
  Fatal error: Uncaught Error: Call to undefined function mysqli_init() in /var/www/html/public_html/test.php:2 Stack trace: #0 {main} thrown in /var/www/html/public_html/test.php on line 2
  </code></pre>
  
  <p>Everywhere it is recommended to execute this command inside the container:</p>
  
  <pre><code>docker-php-ext-install mysqli pdo pdo_mysql &amp;&amp; docker-php-ext-enable pdo_mysql
  </code></pre>
  
  <p>I did it, but it does not help. 
  What more can be done?</p>