The correct spelling of the phrase "did in to" is actually "dig into." The phonetic transcription for this word is /dɪɡ ˈɪntuː/. It is easy to confuse the two since the sound of the letter "t" is very similar to the sound of "g" in some cases. However, understanding the correct spelling is crucial for effective communication in written language. Make sure to double-check your spelling when using idioms or phrases to avoid confusion and miscommunication.