Regular Expressions 101

Explanation

Pro

Group 1((\(\d{3}\) ?)|(\d{3}-))?

?repeats the group contents below at most once:

1st Alternative(\(\d{3}\) ?)

Group 2(\(\d{3}\) ?)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\d{3}a digit, repeated exactly 3 times

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

2nd Alternative(\d{3}-)

Group 3(\d{3}-)

\d{3}a digit, repeated exactly 3 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{3}a digit, repeated exactly 3 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{4}a digit, repeated exactly 4 times

Negative Lookahead(?!([^<]*>)|(((?!<a).)*<\/a>))

1st Alternative([^<]*>)

Group 4([^<]*>)

Negated Character Class[^<]*

*matches any number of characters outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative(((?!<a).)*<\/a>)

Group 5(((?!<a).)*<\/a>)

Group 6((?!<a).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!<a)

<athe literal text <a (case sensitive)

.any character (except for line terminators)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

a>the literal text a> (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

26 tokens

Regular Expression

((\(\d{3}\) ?)|(\d{3}-))?\d{3}-\d{4}(?!([^<]*>)|(((?!<a).)*<\/a>))

New

<div id="departments">
    <ul>
        <li>Department 1 - 8141113900</li>
        <li>Department 2 - pavan 8141119300</li>
        <li>Department 3 - (555) 123-6789</li>
    </ul>
</div>
<input type='text' value='(555) 123-6789' />
(555) 123-6789 <a href=''>(555) 123-6789</a><a href='(555) 123-6789'>(555) 123-6789</a>
<li>Department 1 -<b> (555) 123-1234</b></li>
<li>Department 2 - (555) 123-4321</li>
<li>Department 3 - (555) 123-6789</li>

Substitution

<div id="departments">
    <ul>
        <li>Department 1 - 8141113900</li>
        <li>Department 2 - pavan 8141119300</li>
        <li>Department 3 - (555) 123-6789</li>
    </ul>
</div>
<input type='text' value='(555) 123-6789' />
(555) 123-6789 <a href=''>(555) 123-6789</a><a href='(555) 123-6789'>(555) 123-6789</a>
<li>Department 1 -<b> (555) 123-1234</b></li>
<li>Department 2 - (555) 123-4321</li>
<li>Department 3 - (555) 123-6789</li>