Regular Expressions 101

Non-Capturing Group(?:[^.]*\.){2}

{2}repeats the group contents below exactly 2 times:

Negated Character Class[^.]*

*matches any number of characters outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negated Character Class[^.]*?

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

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:[^.]*\.){2}[^.]*?\K\.

New

My name is Resheil. I'm developing in PHP. I have used mysql for my application.  I want to replace the full stop on the nth position in php.

. Here I had a full stop.