Regex matching multiple lines multiple times
\s*([^:]+?)\s*:\s*(.*(?:\s*(?!.*:).*)*)\s*
This solution matches the date and time string.
How do I modify the above solution so that the date and time is included with the Description: header?
Name: John Doe
Age: 23
Primary Language: English
Description: This is a multiline
description field that I want
to capture Fri, 02 Sep 2022 14:46:45 -0500
Country: Canada
One option could be to exclude matching a comma in the first part before the colon:
^([^,:\n\r]+):(.*(?:\R(?![^,:\n\r]+:).*)*)
Another option could be asserting that the next lines to match do not contain only a single colon:
^([^:\n\r]+):(.*(?:\R(?![^:\n\r]+:[^:\n\r]*$).*)*)
Explanation
^ Start of string([^:\n\r]+) Capture group 1, match 1+ chars other than : or a newline: Match literally( Capture group 2
.* Match the rest of the line(?: Non capture group
\R Match any unicode newline sequence(?![^:\n\r]+:[^:\n\r]*$) Assert that the line does not contain a single occurrence of :.* Match the whole line)* Close the non capture group and optionally repeat it to match all lines) Close group 2See a regex demo and a PHP demo.