Regular Expressions 101

Explanation
Pro

<athe literal text <a (case sensitive)

Positive Lookahead(?=[^>]*?rel=nofollow)

Negated Character Class[^>]*?

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

>the literal > (62₁₀ / 76₈ / 3E₁₆)

rel=nofollowthe literal text rel=nofollow (case sensitive)

Positive Lookahead(?=[^>]*?href="http:\/\/www\.mysite\.com\/.*?")

Negated Character Class[^>]*?

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

>the literal > (62₁₀ / 76₈ / 3E₁₆)

href="http:the literal text href="http: (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

mysitethe literal text mysite (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^>]*?

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

>the literal > (62₁₀ / 76₈ / 3E₁₆)

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

25 tokens

Regular Expression

<a(?=[^>]*?rel=nofollow)(?=[^>]*?href="http:\/\/www\.mysite\.com\/.*?")[^>]*?>

New

<a .rel=nofollow .. href="http://www.mysite.com/xyz...." ... >
<a . .. href="huntoffice.ie" ..rel=nofollow. >
<a...> rel=nofollow href="http://www.mysite.com/"