title: mysqli extension is not present in php.ini file
body: <p>I asked this question recently :
  <a href="https://stackoverflow.com/questions/22651936/php-is-not-working-on-server">PHP is not working on server</a></p>
  
  <p>I asked my hosting service provider to enable these extensions in <em>php.ini</em> by removing semi colon .</p>
  
  <pre><code>;extension=php_mysql.so
  ;extension=php_mysqli.so
  ;extension=php_pdo_mysql.so
  </code></pre>
  
  <p>They replied me that there is no option like this present in <em>php.ini</em> file.</p>
  
  <p>Please tell me what I tell them to what to do? Because without this I can't connect to database and many more things. </p>
  
  <p>Note : They are running in Linux.</p>