title: phpmyadmin - mbstring extension is missing in php 7.4
body: <p>php version :7.4.8
  OS: ubuntu</p>
  <blockquote>
  <p>when I try to localhost/phpmyadmin am getting this error</p>
  </blockquote>
  <p>The mbstring extension is missing. Please check your PHP configuration.</p>
  <p>and I already install mbstring</p>
  <pre><code>sudo apt-get install php-mbstring
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  php-mbstring is already the newest version (2:7.4+76+ubuntu18.04.1+deb.sury.org+9).
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  
  sudo apt-get install php7.4-mbstring
  Reading package lists... Done
      Building dependency tree       
      Reading state information... Done
      php-mbstring is already the newest version (2:7.4+76+ubuntu18.04.1+deb.sury.org+9).
      0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  </code></pre>
  <p>I try this method as well</p>
  <ol>
  <li>I find php.ini</li>
  <li>I search extension=php_mbstring.dll</li>
  </ol>
  <p>but ;extension=php_mbstring.dll is missing in php.ini file</p>
  <p>how can I solve this problem?</p>