Regular Expressions 101

Character Class[?&]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

source=the literal text source= (case sensitive)

Group 1([^&]+)

Negated Character Class[^&]+

+matches at least one character outside the set below:

&the literal & (38₁₀ / 46₈ / 26₁₆)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

[?&]source=([^&]+)

New

www.google.it?source=google&medium=cpc
www.google.it?source=google&
www.google.it?medium=cpc&source=google&
www.google.it?medium=cpc&source=google&keyword=foo
www.google.it?medium=cpc&source=google&keyword=foo&source=bing

Regular Expression

Extraction