regex101: PCRE (Legacy) Match Workspace

Non-Capturing Group(?:[&§][a-z0-9])?

?repeats the group contents below at most once:

Character Class[&§]

&the literal & (38₁₀ / 46₈ / 26₁₆)

§the literal § (167₁₀ / 247₈ / A7₁₆)

Character Class[a-z0-9]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 1([--:\w?@%&+~#=]*\.[a-z]{2,4}\/{0,2})

Character Class[--:\w?@%&+~#=]*

*matches any number of characters from the set below:

--:one character from - (45₁₀) to : (58₁₀)

\wany word character

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]{2,4}

{2,4}matches between 2 and 4 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\/{0,2}the literal / (47₁₀ / 57₈ / 2F₁₆) , repeated between 0 and 2 times

Group 2((?:[?&]\w+=\w+)+|[--:\w?@%&+~#=]+)?

?repeats the group contents below at most once:

1st Alternative(?:[?&]\w+=\w+)+

Non-Capturing Group(?:[?&]\w+=\w+)+

+repeats the group contents below at least once:

Character Class[?&]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

\w+any word character, repeated at least once

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\w+any word character, repeated at least once

2nd Alternative[--:\w?@%&+~#=]+

Character Class[--:\w?@%&+~#=]+

+matches at least one character from the set below:

--:one character from - (45₁₀) to : (58₁₀)

\wany word character

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

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

Search reference

Regular Expression

(?:[&§][a-z0-9])?([--:\w?@%&+~#=]*\.[a-z]{2,4}\/{0,2})((?:[?&]\w+=\w+)+|[--:\w?@%&+~#=]+)?

Unit Tests

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