Purpose

Handles incoming trackbacks/pingbacks, validates data, and creates trackback comments.

Flow

• Loads WordPress and runs wp( array( 'tb' => '1' ) ) when needed.
• Runs as unauthenticated user.
• Parses and validates incoming trackback fields.
• Verifies target post and pings open status.
• Creates a trackback comment via wp_new_comment().
• Responds with XML success/error.

Key functions called

• wp()
• wp_set_current_user( 0 )
• pings_open()
• wp_new_comment()

Hooks fired

• Actions:
  • pre_trackback_post
  • trackback_post