php - How to trigger javascript on mysql update event -

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this question has answer here:

i working on chat should display messages in real time.
messages stored in mysql-database.

every dataset has:

  • an auto-increment, unique id
  • name
  • text
  • timestamp

the chat works fine, @ moment trigger javascript function setinterval.
question: there way trigger function when there new set of data in database?

i @ using web sockets. see ratchet example of implementing. believe sample chat application.


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