Regular Expressions 101

1st Alternative[?&]page=[^&\n]+$

Character Class[?&]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

page=the literal text page= (case sensitive)

Negated Character Class[^&\n]+

+matches at least one character outside the set below:

&the literal & (38₁₀ / 46₈ / 26₁₆)

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

$end of line

2nd Alternative([&?])page=[^&\n]+&

Group 1([&?])

Character Class[&?]

&the literal & (38₁₀ / 46₈ / 26₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

page=the literal text page= (case sensitive)

Negated Character Class[^&\n]+

+matches at least one character outside the set below:

&the literal & (38₁₀ / 46₈ / 26₁₆)

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

&the literal & (38₁₀ / 46₈ / 26₁₆)

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.

Search reference

Regular Expression

[?&]page=[^&\n]+$|([&?])page=[^&\n]+&

New

url1?name=John&page=12&mfgid=310
url2?name=John&page=12
url3?page=12&name=John&mfgid=320&my-page=12&foo=bar
url4?page=12

$1