Function: Sanitizes plugin data, optionally adds markup, optionally translates.

Function: Gets a list of a plugin’s files.

Function: Checks the plugins directory and retrieve all plugin files with plugin data.

Function: Checks the mu-plugins directory and retrieve all mu-plugin files with any plugin data.

Function: Declares a callback to sort array by a ‘Name’ key.

Function: Checks the wp-content directory and retrieve all drop-ins with any plugin data.

Function: Returns drop-ins that ClassicPress uses.

Function: Determines whether a plugin is active.

Function: Determines whether the plugin is inactive.