Regular Expressions 101

Group 1(<(p|li)\b[^<>]*>[^<>\n]*)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Group 2(p|li)

1st Alternativep

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

2nd Alternativeli

lithe literal text li (case sensitive)

\ban ASCII word boundary

Negated Character Class[^<>]*

*matches any number of characters outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Negated Character Class[^<>\n]*

*matches any number of characters outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\na line-feed (newline) character (ASCII 10)

\ban ASCII word boundary

Group 3(Cat|Dog|Fish)

1st AlternativeCat

Catthe literal text Cat (case sensitive)

2nd AlternativeDog

Dogthe literal text Dog (case sensitive)

3rd AlternativeFish

Fishthe literal text Fish (case sensitive)

\ban ASCII word boundary

Group 4([^<>\n]*<\/\2>)

Negated Character Class[^<>\n]*

*matches any number of characters outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\na line-feed (newline) character (ASCII 10)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\2the text saved by group 2

>the literal > (62₁₀ / 76₈ / 3E₁₆)

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

(<(p|li)\b[^<>]*>[^<>\n]*)\b(Cat|Dog|Fish)\b([^<>\n]*<\/\2>)

New

(1) <p> Cat test dfdsf</p>
(2) <p> Cat.</p>
(3) <p>Cat.</p>
(4) <p class="test">Cat</p>
(5) <li>Cat</li>
(6) <p>Catfgdggh</p>
(7) <div>Cat</div>

$1lol$4