Regular Expressions 101

^start of line

Group 1(category)

categorythe literal text category (case sensitive)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2([^/]+)

Negated Character Class[^/]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 3([^/]+)

Negated Character Class[^/]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 4((?:(?!\bitem\b).)+)

Non-Capturing Group(?:(?!\bitem\b).)+

+repeats the group contents below at least once:

Negative Lookahead(?!\bitem\b)

\ban ASCII word boundary

itemthe literal text item (case sensitive)

\ban ASCII word boundary

.any character (except for line terminators)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 5([^/]+)

Negated Character Class[^/]+

+matches at least one character outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

$end of line

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

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Search reference

Regular Expression

^(category)/([^/]+)/([^/]+)/((?:(?!\bitem\b).)+)/([^/]+)/?$

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