Regular Expressions 101

Non-Capturing Group(?:<ul>)?

?repeats the group contents below at most once:

<ul>the literal text <ul> (case sensitive)

Group 1(\s*<li class="myclass">(.+)<\/li>\s*)

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

<li class="myclass">the literal text <li class="myclass"> (case sensitive)

Group 2(.+)

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

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

li>the literal text li> (case sensitive)

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

Non-Capturing Group(?:<\/ul>)?

?repeats the group contents below at most once:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

ul>the literal text ul> (case sensitive)

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

(?:<ul>)?(\s*<li class="myclass">(.+)<\/li>\s*)(?:<\/ul>)?

New

<ul>
    <li class="myclass">blablabla 1</li>
    <li class="myclass">blablabla 2</li>
    <li class="myclass">blablabla 3</li>
</ul>

<div class="newClass">$2</div>\n

<ul>
    <li class="myclass">blablabla 1</li>
    <li class="myclass">blablabla 2</li>
    <li class="myclass">blablabla 3</li>
</ul>