Regular Expressions 101

Pro

Non-Capturing Group(?:<(a|img)(?:\s[^>]*)*>)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Group 1(a|img)

1st Alternativea

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

2nd Alternativeimg

imgthe literal text img (case sensitive)

Non-Capturing Group(?:\s[^>]*)*

*repeats the group contents below any number of times:

\sany whitespace character

Negated Character Class[^>]*

*matches any number of characters outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Group 2((?:(?!<\1).)*)

Non-Capturing Group(?:(?!<\1).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!<\1)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\1the text saved by group 1

.any character (except for line terminators)

Non-Capturing Group(?:<\/\1>)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\1the text saved by group 1

>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.

25 tokens

Regular Expression

(?:<(a|img)(?:\s[^>]*)*>)((?:(?!<\1).)*)(?:<\/\1>)

New


<img>content</img> <img src="some-pic-url">content</img>
<a> content </a> <a href="url">content</a>

<a href="url">content</img>
<img src="some-pic-url">content</a>

Extraction


<img>content</img> <img src="some-pic-url">content</img>
<a> content </a> <a href="url">content</a>

<a href="url">content</img>
<img src="some-pic-url">content</a>