PHP Regex to Capture mm:ss.uuu AND hh:mm:ss.uuu

Question

I'm trying to capture the timestamps of some caption files with some luck.

I've managed to get an expression that will partially capture hh:mm:ss.uuu as shown in #910 below, but am unable to figure out how to capture the groups if the optional h: or hh: is not present. My work so far is at https://regex101.com/r/4QWySg/1. As you can see, it's only capturing after the first hour is encountered.

Any help is appreciated :)

909
59:48.420 --> 1:00:06.450
THERE SHOULD BE AN OPTION TO UNMUTE DO

910
1:00:06.460 --> 1:00:09.870
YOU SEE A MICROPHONE ICON ANYWHERE ON YOUR TEAMS


(^d+$R)?(d{1,2}(?::d{2}){2}.d{2,3})s*-->s*(d{1,2}(?::d{2}){2}.d{2,3})R((?:[^
]|
?
[^
])*)(?:
?

?
|$)

question from:https://stackoverflow.com/questions/65912268/php-regex-to-capture-mmss-uuu-and-hhmmss-uuu

Answer 1

You can simplify your regex and get all matches using this in PHP:

((?:d{1,2}:)?d{2}:d{2}.d{2,3})s*-->s*((?1))R(.+)

RegEx Demo

RegEx Details:

• (: Start capture group #1
  • (?:d{1,2}:)?: Match optional hour digits followed by :
  • d{2}:d{2}.d{2,3}: Match mm:ss.uuu part
• ): End capture group #1
• h*-->h*: Match -> surrounded with optional spaces on both sides
• ((?1)): recurses the 1st subpattern i.e. match using same pattern as in group #1. Capture this in group #2
• R: Match any newline
• (.+): Match 1+ of any characters in 3rd capture group for caption