Regular Expressions 101

Pro

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Non-Capturing Group(?:(\w+)\s?)?

?repeats the group contents below at most once:

Group 1(\w+)

\w+any word character, repeated at least once

\s?optionally matches any whitespace character

Non-Capturing Group(?:(\w+)\s?)?

?repeats the group contents below at most once:

Group 2(\w+)

\w+any word character, repeated at least once

\s?optionally matches any whitespace character

Non-Capturing Group(?:(\w+)\s?)?

?repeats the group contents below at most once:

Group 3(\w+)

\w+any word character, repeated at least once

\s?optionally matches any whitespace character

Non-Capturing Group(?:(\w+)\s?)?

?repeats the group contents below at most once:

Group 4(\w+)

\w+any word character, repeated at least once

\s?optionally matches any whitespace character

Non-Capturing Group(?:(\w+)\s?)?

?repeats the group contents below at most once:

Group 5(\w+)

\w+any word character, repeated at least once

\s?optionally matches any whitespace character

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

\[(?:(\w+)\s?)?(?:(\w+)\s?)?(?:(\w+)\s?)?(?:(\w+)\s?)?(?:(\w+)\s?)?\]

New

[bad column name]

[bad column]

[very very bad column name]

[$1$2$3$4$5]

[bad column name]

[bad column]

[very very bad column name]