title: The requested PHP extension ext-mysqli * is missing on php 7.2 on ubuntu 16.04
body: <p>when I </p>
  
  <pre><code>composer create-project phpmyadmin/phpmyadmin
  </code></pre>
  
  <p>I got the problems:</p>
  
  <pre><code>- The requested PHP extension ext-mysqli * is missing from your system. Install or enable PHP's mysqli extension.
  </code></pre>
  
  <p>I had edit my php.ini and restart the php and nginx but still show the error?</p>
  
  <pre><code>sudo systemctl restart php7.2-fpm
  sudo systemctl restart nginx
  
  sudo nano /etc/php/7.2/fpm/php.ini
  
  cgi.fix_pathinfo=0
  ;extension=bz2
  extension=curl
  ;extension=fileinfo
  extension=gd2
  ;extension=gettext
  ;extension=gmp
  extension=intl
  extension=imap
  ;extension=interbase
  ;extension=ldap
  extension=mbstring
  ;extension=exif      ; Must be after mbstring as it depends on it
  extension=mysqli
  ;extension=oci8_12c  ; Use with Oracle Database 12c Instant Client
  ;extension=odbc
  extension=openssl
  ;extension=pdo_firebird
  extension=pdo_mysql
  ;extension=pdo_oci
  ;extension=pdo_odbc
  ;extension=pdo_pgsql
  extension=pdo_sqlite
  ;extension=gettext
  ;extension=gmp
  extension=intl
  extension=imap
  ;extension=interbase
  ;extension=ldap
  extension=mbstring
  ;extension=exif      ; Must be after mbstring as it depends on it
  extension=mysqli
  ;extension=oci8_12c  ; Use with Oracle Database 12c Instant Client
  ;extension=odbc
  extension=openssl
  ;extension=pdo_firebird
  extension=pdo_mysql
  ;extension=pdo_oci
  ;extension=pdo_odbc
  ;extension=pdo_pgsql
  extension=pdo_sqlite
  ;extension=pgsql
  ;extension=shmop
  
  ; The MIBS data available in the PHP distribution must be installed.
  ; See http://www.php.net/manual/en/snmp.installation.php
  ;extension=snmp
  
  ;extension=soap
  ;extension=sockets
  ;extension=sqlite3
  ;extension=tidy
  extension=xmlrpc
  ;extension=xsl
  </code></pre>
  
  <p>Do I need to install another mysqli? It's so strange. I had install the
  sudo apt-get install php7.2-fpm php7.2-mysql php7.2-cgi php7.2-common php-pear php7.2-mbstring<br>
  before and work well. But I don't know why it has the problem when I reinstall the ubuntu and mariaDB and php 7.2 and phpmyadmin.</p>