Regular Expressions 101

^start of line

Positive Lookahead(?=\/page-title\/?\??(?!(.+\/)|-))

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

page-titlethe literal text page-title (case sensitive)

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

\??optionally matches the literal ? (63₁₀ / 77₈ / 3F₁₆)

Negative Lookahead(?!(.+\/)|-)

1st Alternative(.+\/)

Group 1(.+\/)

.+any character (except for line terminators), repeated at least once

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

.+any character (except for line terminators), repeated at least once

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

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

^(?=\/page-title\/?\??(?!(.+\/)|-)).+

New

/page-title
/page-title/
/page-title?
/page-title/?
/page-title?foo
/page-title/?foo=bar

/page-title/foo/
/page-title-foo-bat

/page-title
/page-title/
/page-title?
/page-title/?
/page-title?foo
/page-title/?foo=bar

/page-title/foo/
/page-title-foo-bat