Regular Expressions 101

Positive Lookbehind(?<=<td.*?>)

<tdthe literal text <td (case sensitive)

.*?any character (except for line terminators), repeated any number of times

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Group 1([0-3]?[0-9])

Character Class[0-3]?

?matches at most one character from the set below:

0-3one character from 0 (48₁₀) to 3 (51₁₀)

Character Class[0-9]

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2([0-3]?[0-9])

Character Class[0-3]?

?matches at most one character from the set below:

0-3one character from 0 (48₁₀) to 3 (51₁₀)

Character Class[0-9]

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 3((?:[0-9]{2})?[0-9]{2})

Non-Capturing Group(?:[0-9]{2})?

?repeats the group contents below at most once:

Character Class[0-9]{2}

{2}matches exactly 2 characters from the set below:

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

Character Class[0-9]{2}

{2}matches exactly 2 characters from the set below:

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

Positive Lookahead(?=.*?<\/td>)

.*?any character (except for line terminators), repeated any number of times

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

td>the literal text td> (case sensitive)

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

(?<=<td.*?>)([0-3]?[0-9])\/([0-3]?[0-9])\/((?:[0-9]{2})?[0-9]{2})(?=.*?<\/td>)

New

<table>
<tr>
<td class="test">9/2/2021 10:59:15 AM</td>
</tr>

<tr>
<td class="test">12/15/2015 12:10:45 PM</td>
</tr>

<tr>
<td class="test">10/10/2012 5:00:10 AM</td>
</tr>
</table>

Regular Expression

Extraction