How to count the number of seconds of a WAV file using PHP?

Question

PHP

Good afternoon!
Question within a question. I'm converting MP3 -> WAV by calling a system function from PHP, but now I need to count the number of seconds in the resulting WAV file using PHP. But how to do that? Are there any libraries for working with WAV files?

Answer 1

ffprobe
here is an example with ffmpeg

Answer 2

snipplr.com/view/285/read-wav-header-and-calculate...

Answer 3

mp3 is divided into frames, usually 1ms. I'm lying.
here - https://habrahabr.ru/post/103635/