Reference

Authentication Functions used for authenticating
ig_auth()	Log in to Instagram
ig_sync_features()	Synchronise experiments
Retrieve Functions Functions used for getting data
ig_get_user_id()	Get a User Id
ig_get_user_profile()	Get a User's Profile
ig_get_user_feed()	Get Feed of a User's Posts
ig_get_user_tags()	Get Feed of Posts for a Tagged User
ig_get_hashtag_feed()	Get Feed of a Hashtag
ig_get_location_feed()	Get Feed of a Location
ig_get_popular_feed()	Get Feed of Popular Posts
ig_get_liked_feed() ig_get_saved_feed()	Get Feed of Liked or Saved Posts
ig_get_followers() ig_get_following()	Get Follower Info
Search Functions Functions used for searching data
ig_search_users()	Search by Username
ig_search_tags()	Search by Hashtag
Media Functions Functions typically used to interact with media (a.k.a. posts)
ig_like() ig_unlike()	Like or Unlike a Post
ig_save() ig_unsave()	Save or Unsave a Post
ig_comment() ig_comment_delete()	Comment or Delete a Comment on a Post
ig_comment_delete_bulk()	Delete Comments on a Post in Bulk
ig_get_media_info()	Get Media Info
ig_get_media_comments() ig_get_media_likers()	Get Media Comments and Likers
ig_edit_media_caption()	Edit a Post's Caption
ig_delete_media()	Delete a Post
Activity Functions Functions for recent activity and timelines as it relates to your account
ig_my_timeline()	Get the authenticated user's timeline feed
ig_my_inbox()	Get direct inbox messages for your account
ig_my_recent_activity()	Get news feed of recent activities by you
ig_following_recent_activity()	Get news feed of recent activities for accounts you follow
ig_autocomplete_userlist()	Get bootstrap user data (autocompletion user list)