regex101: PCRE (Legacy) Match Workspace

Pro

Group 1(^\d{4}(-\d{2}){2}([^|]+\|){3})

^start of line

\d{4}a digit, repeated exactly 4 times

Group 2(-\d{2}){2}

{2}repeats the group contents below exactly 2 times:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{2}a digit, repeated exactly 2 times

Group 3([^|]+\|){3}

{3}repeats the group contents below exactly 3 times:

Negated Character Class[^|]+

+matches at least one character outside the set below:

|the literal | (124₁₀ / 174₈ / 7C₁₆)

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

Group 4([\s\S]*?)

Character Class[\s\S]*?

*?matches any number of characters from the set below:

\sany whitespace character

\Sany non-whitespace character

\n*a line-feed (newline) character (ASCII 10), repeated any number of times

Positive Lookahead(?=^\d{4}.*?(?:[^|\n]+\|){3}|\z)

1st Alternative^\d{4}.*?(?:[^|\n]+\|){3}

^start of line

\d{4}a digit, repeated exactly 4 times

.*?any character (except for line terminators), repeated any number of times

Non-Capturing Group(?:[^|\n]+\|){3}

{3}repeats the group contents below exactly 3 times:

Negated Character Class[^|\n]+

+matches at least one character outside the set below:

|the literal | (124₁₀ / 174₈ / 7C₁₆)

\na line-feed (newline) character (ASCII 10)

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

2nd Alternative\z

\zend of string

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

25 tokens

Regular Expression

(^\d{4}(-\d{2}){2}([^|]+\|){3})([\s\S]*?)\n*(?=^\d{4}.*?(?:[^|\n]+\|){3}|\z)

New

2015-03-03 19:30:47.2725|INFO|MyApp|This is a single line log message.

2015-03-03 19:31:29.1209|INFO|MyApp|This log message has multiple
lines with
2015-03-03
a date in it.

2015-03-03 19:32:50.1106|INFO|MyApp|This log message has
multiple lines
but just text only.

2015-03-03 19:33:20.2683|ERROR|MyApp|This log message has multiple lines but
also some confusing text like
2015-03-03 19:33:20.2683|ERROR| which should
still be a valid log message.

Extraction

2015-03-03 19:30:47.2725|INFO|MyApp|This is a single line log message.

2015-03-03 19:31:29.1209|INFO|MyApp|This log message has multiple
lines with
2015-03-03
a date in it.

2015-03-03 19:32:50.1106|INFO|MyApp|This log message has
multiple lines
but just text only.

2015-03-03 19:33:20.2683|ERROR|MyApp|This log message has multiple lines but
also some confusing text like
2015-03-03 19:33:20.2683|ERROR| which should
still be a valid log message.