Regular Expressions 101

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Group 1(th|td)

1st Alternativeth

ththe literal text th (case insensitive)

2nd Alternativetd

tdthe literal text td (case insensitive)

Negated Character Class[^>]*

*matches any number of characters outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\r?optionally matches a carriage return (ASCII 13)

\n?optionally matches a line-feed (newline) character (ASCII 10)

Group 2([\s\S]*?)

Character Class[\s\S]*?

*?matches any number of characters from the set below:

\sa Unicode whitespace character

\Sany character that is not Unicode whitespace

\r?optionally matches a carriage return (ASCII 13)

\n?optionally matches a line-feed (newline) character (ASCII 10)

<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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

u modifier: unicode. Treats the pattern and subject as UTF-16

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

<(th|td)[^>]*>\r?\n?([\s\S]*?)\r?\n?<\/\1>

<table>
<tr>
  <th> test th </th>
</tr><tr>
  <td> test td </td>
</tr>
</table>