title: "Could not find driver" message when executing query
body: <p>I have a Laravel project. It was fine until I updated my Ubuntu 19.04 to 19.10. While testing my APIs on Postman I get this error:</p>
  
  <pre><code>"message": "could not find driver (SQL: select * from `users` where `username` = genesis limit 1)",
  "exception": "Illuminate\\Database\\QueryException",
  "file": "/home/arkhalis/Repos/laravel/safetrade/vendor/laravel/framework/src/Illuminate/Database/Connection.php",
  "line": 664
  </code></pre>
  
  <p>and after that I tried to run <code>Composer</code> on terminal and got this output</p>
  
  <pre><code>PHP Fatal error:  Uncaught Error: Call to undefined function Symfony\Component\Console\Helper\mb_detect_encoding() in /usr/share/php/Symfony/Component/Console/Helper/Helper.php:50
  Stack trace:
  #0 /usr/share/php/Symfony/Component/Console/Descriptor/TextDescriptor.php(329): Symfony\Component\Console\Helper\Helper::strlen('h')
  #1 /usr/share/php/Symfony/Component/Console/Descriptor/TextDescriptor.php(97): Symfony\Component\Console\Descriptor\TextDescriptor-&gt;calculateTotalWidthForOptions(Array)
  #2 /usr/share/php/Symfony/Component/Console/Descriptor/TextDescriptor.php(197): Symfony\Component\Console\Descriptor\TextDescriptor-&gt;describeInputDefinition(Object(Symfony\Component\Console\Input\InputDefinition), Array)
  #3 /usr/share/php/Symfony/Component/Console/Descriptor/Descriptor.php(55): Symfony\Component\Console\Descriptor\TextDescriptor-&gt;describeApplication(Object(Composer\Console\Application), Array)
  #4 /usr/share/php/Symfony/Component/Console/Helper/DescriptorHelper.php(67): Symfony\Component\Console\Descriptor\Descriptor-&gt;describ in /usr/share/php/Symfony/Component/Console/Helper/Helper.php on line 50
  
  Fatal error: Uncaught Error: Call to undefined function Symfony\Component\Console\Helper\mb_detect_encoding() in /usr/share/php/Symfony/Component/Console/Helper/Helper.php:50
  Stack trace:
  #0 /usr/share/php/Symfony/Component/Console/Descriptor/TextDescriptor.php(329): Symfony\Component\Console\Helper\Helper::strlen('h')
  #1 /usr/share/php/Symfony/Component/Console/Descriptor/TextDescriptor.php(97): Symfony\Component\Console\Descriptor\TextDescriptor-&gt;calculateTotalWidthForOptions(Array)
  #2 /usr/share/php/Symfony/Component/Console/Descriptor/TextDescriptor.php(197): Symfony\Component\Console\Descriptor\TextDescriptor-&gt;describeInputDefinition(Object(Symfony\Component\Console\Input\InputDefinition), Array)
  #3 /usr/share/php/Symfony/Component/Console/Descriptor/Descriptor.php(55): Symfony\Component\Console\Descriptor\TextDescriptor-&gt;describeApplication(Object(Composer\Console\Application), Array)
  #4 /usr/share/php/Symfony/Component/Console/Helper/DescriptorHelper.php(67): Symfony\Component\Console\Descriptor\Descriptor-&gt;describ in /usr/share/php/Symfony/Component/Console/Helper/Helper.php on line 50
  </code></pre>
  
  <p>Also I have tried to run <code>composer update</code> and got the same result as <a href="https://stackoverflow.com/questions/36979019/getting-error-while-updating-composer">this question</a> and run <code>sudo apt-get install php-mbstring</code> but the same result as I run <code>composer</code> command on terminal.</p>