Regular Expressions 101

Character Class[?&]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

param=the literal text param= (case sensitive)

Group 1([^&]*)

Negated Character Class[^&]*

*matches any number of characters outside the set below:

&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

[?&]param=([^&]*)

New

https://www.heapanalytics.com?param=value1&foo=bar
https://www.heapanalytics.com?foo=bar&param=value2&bar=baz
https://www.heapanalytics.com?foo=bar&bar=baz&param=value3

Regular Expression

Extraction