Regular Expressions 101

Pro

Group 1(id="page_([0-9]+)" +class=)

id="page_the literal text id="page_ (case sensitive)

Group 2([0-9]+)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

"the literal " (34₁₀ / 42₈ / 22₁₆)

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

class=the literal text class= (case sensitive)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^"]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

">the literal text ">

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

(id="page_([0-9]+)" +class=)"[^"]*">

New

<a id="page_123" class="garbage1"></a>some text<a id="page_124" class="garbage2"></a>

\1"pagenum"> \2

<a id="page_123" class="garbage1"></a>some text<a id="page_124" class="garbage2"></a>