Question

There has always been a confusion with preg_match in php.
I have a string like this:

apsd_01_03s_somedescription
apsd_02_04_somedescription

Can I use preg_match to strip off anything from 3rd underscore including the 3rd underscore.

thanks.

Answer 1

Try this:

preg_replace('/^([^_]*_[^_]*_[^_]*).*/', '$1', $str)

This will take only the first three sequences that are separated by _. So everything from the third _ on will be removed.