Install Wizard Database Errors (Access Denied for Root)

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I had the same issue with:

  • CentOS NGINX PHP 5.4
  • CentOS NGINX PHP 5.6
  • CentOS NGINX PHP 7
  • CentOS Apache PHP 7

I fixed it by putting back :
;cgi.fix_pathinfo=0
into /etc/php.ini

I also modified my security.limit but it’s optional
security.limit_extensions = .php
into /etc/php-fpm.d/www.conf

this post gave me the idea : Access denied on nginx