Regular Expressions 101

Positive Lookbehind(?<=[?&])

Character Class[?&]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

Group 1([^=]+)

Negated Character Class[^=]+

+matches at least one character outside the set below:

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

Negated Character Class[^=]+

+matches at least one character outside the set below:

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Positive Lookahead(?=&|$)

1st Alternative&

&the literal & (38₁₀ / 46₈ / 26₁₆)

2nd Alternative$

$end of string, or before its final line terminator

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<=[?&])([^=]+)=\K[^=]+(?=&|$)

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