Regular Expressions 101

hello=the literal text hello= (case insensitive)

Character Class[a-z\s0-9]+

+matches at least one character from the set below:

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

\sany whitespace character

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

&op=the literal text &op= (case insensitive)

Character Class[a-z0-9]*

*matches any number of characters from the set below:

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

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

Global pattern flags

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

hello=[a-z\s0-9]+&op=[a-z0-9]*

New

&hello=HI1&op=1h23&hello=&op=&hello=HI3&op=&hello=HI4&op=OP4