Phineas and Ferb was inspired by their boyhood memories of summer vacation; Povenmire and Marsh both felt the theme of school in television had fallen to redundancy and wanted to create a series that took place solely in the summertime.
Phineas dan Ferb terinspirasi oleh kenangan masa kecil mereka tentang liburan musim panas; Povenmire dan Marsh merasa tema sekolah di televisi telah jatuh ke pleonasme dan ingin membuat serial yang berlangsung hanya di musim panas.