Regular Expressions 101

Explanation

Pro

Non-Capturing Group(?:(?<=q=|\+)([^$"+#&,]+)(?!.*q=))

Positive Lookbehind(?<=q=|\+)

1st Alternativeq=

q=the literal text q= (case sensitive)

2nd Alternative\+

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

Group 1([^$"+#&,]+)

Negated Character Class[^$"+#&,]+

+matches at least one character outside the set below:

$the literal $ (36₁₀ / 44₈ / 24₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Negative Lookahead(?!.*q=)

.*any character (except for line terminators), repeated any number of times

q=the literal text q= (case sensitive)

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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25 tokens

(?:(?<=q=|\+)([^$"+#&,]+)(?!.*q=))

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