Basic configuration for Wordpress.

If doesn't exist, create mu-plugins directory on wp-content/. (Not inside wp-content/plugins !)

Put .php script on the mu-plugins root directory : wp-content/mu-plugins/my-php-script.php

Codex:Must Use Plugins.

• Allow SVG through WordPress Media Uploader
• Remove the <div> surrounding the dynamic navigation to cleanup markup
• Remove Injected classes, ID's and Page ID's from Navigation <li> items
• Remove invalid rel attribute values in the categorylist
• Remove wp_head() injected Recent Comment styles
• Remove 'text/css' from our enqueued stylesheet
• Remove XMLRPC method (limit "bruteforce" attack)
• Remove actions :
  • Remove the links to the extra feeds such as category feeds
  • Remove the links to the general feeds: Post and Comment Feed
  • Remove the link to the Really Simple Discovery service endpoint, EditURI link
  • Remove the link to the Windows Live Writer manifest file.
  • Remove Index link
  • Remove Prev link
  • Remove Start link
  • Remove relational links for the posts adjacent to the current post.
  • Remove the XHTML generator that is generated on the wp_head hook, WP version
  • Remove adjacent posts to the current post
  • Remove canonical
  • Remove shortlink
• Add filters :
  • Allow shortcodes in Dynamic Sidebar
  • Remove <p> tags in Dynamic Sidebars (better!)
  • Remove surrounding <div> from WP Navigation
  • Remove auto <p> tags in Excerpt (Manual Excerpts only)
  • Allows Shortcodes to be executed in Excerpt (Manual Excerpts only)
  • Santiize file name accent on upload
• Remove filter :
  • Remove <p> tags from Excerpt altogether