Regular Expressions 101

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

Group 1((?:(?!</?blockquote).)*?)

Non-Capturing Group(?:(?!</?blockquote).)*?

*?repeats the group contents below any number of times:

Negative Lookahead(?!</?blockquote)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

blockquotethe literal text blockquote (case sensitive)

.any character

</p>the literal text </p> (case sensitive)

Positive Lookahead(?=(?:(?!</?blockquote).)*</blockquote>)

Non-Capturing Group(?:(?!</?blockquote).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!</?blockquote)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

blockquotethe literal text blockquote (case sensitive)

.any character

</blockquote>the literal text </blockquote> (case sensitive)

Global pattern flags

s modifier: single line. Allows a dot to match line terminators

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

<p>((?:(?!</?blockquote).)*?)</p>(?=(?:(?!</?blockquote).)*</blockquote>)

New

<blockquote>
    <p>paragraph 1</p>
</blockquote>
<p>paragraph 1 outside blockquote</p>
<blockquote>
    <p>paragraph 2</p>
    <p>paragraph 3</p>
</blockquote>
<p>paragraph 2 outside blockquote</p>

Substitution

<div>\1</div>

<blockquote>
    <p>paragraph 1</p>
</blockquote>
<p>paragraph 1 outside blockquote</p>
<blockquote>
    <p>paragraph 2</p>
    <p>paragraph 3</p>
</blockquote>
<p>paragraph 2 outside blockquote</p>