Regular Expressions 101

Explanation

Pro

1st Alternative 

 the literal text   (case sensitive)

2nd Alternative<(?!\/?(?:li|ul|a)\b)\/?[^>]+(?:>|$)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Negative Lookahead(?!\/?(?:li|ul|a)\b)

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

Non-Capturing Group(?:li|ul|a)

1st Alternativeli

lithe literal text li (case sensitive)

2nd Alternativeul

ulthe literal text ul (case sensitive)

3rd Alternativea

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\ban ASCII word boundary

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

Negated Character Class[^>]+

+matches at least one character outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Non-Capturing Group(?:>|$)

1st Alternative>

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative$

$end of line

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.

26 tokens

&nbsp;|<(?!\/?(?:li|ul|a)\b)\/?[^>]+(?:>|$)

New

<a href="ddd">eee</a><p> some text </p> and <li>text</li> <li/> <a/> <a /> &nbsp;
<ul> </ul>

<a href="ddd">eee</a><p> some text </p> and <li>text</li> <li/> <a/> <a /> &nbsp;
<ul> </ul>