title: find the id of a post by its wordpress title
body: <p>I have a little problem with wordpress, I would like to update the date of a video post with an xlsx file.
  I retrieve the data from my file and now I would like to retrieve the post id which is already created with the title  of the post (Title which I have in my xlsx file and which is the same as that of the post created).
  I not sure how to do it  can you help me plz?</p>