Regular Expressions 101

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Group 1(.+?)

.+?any character (except for line terminators), repeated at least once

class=the literal text class= (case sensitive)

\s*any whitespace character, repeated any number of times

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 2(.+?)

.+?any character (except for line terminators), repeated at least once

"the literal " (34₁₀ / 42₈ / 22₁₆)

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

<(.+?)class=\s*"(.+?)"

New

<h1 class="big blue" id="testing"> some text </h1>