Regular Expressions 101

1st Alternative<h1>[^<>]*<\/h1>(*SKIP)(*F)

<h1>the literal text <h1> (case insensitive)

Negated Character Class[^<>]*

*matches any number of characters outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

h1>the literal text h1> (case insensitive)

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*F)forces the current match attempt to fail at this position

2nd Alternative(\bsample|text\b)(?=[^>]*(?:<|$))

Group 1(\bsample|text\b)

1st Alternative\bsample

\ban ASCII word boundary

samplethe literal text sample (case insensitive)

2nd Alternativetext\b

textthe literal text text (case insensitive)

\ban ASCII word boundary

Positive Lookahead(?=[^>]*(?:<|$))

Negated Character Class[^>]*

*matches any number of characters outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Non-Capturing Group(?:<|$)

1st Alternative<

<the literal < (60₁₀ / 74₈ / 3C₁₆)

2nd Alternative$

$end of string, or before its final line terminator

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

<h1>[^<>]*<\/h1>(*SKIP)(*F)|(\bsample|text\b)(?=[^>]*(?:<|$))

New

here is a sample text to test match <a href="sample.html">text sample here</a> text sample here <h1>sample text i do not want to match :(</h1>