testing the string abc xyx 12 13 a a b

This will find all instances where the WP i18n function __() is used, and change the text domain to something else. This will recognize instances of the function use as separate, even if they appear in the same function

Test regex for question.

Regex to verify PAN in India

I'm trying to match a hostname input with the following properties: a-z A-Z 0-9 : - are allowed ; doesnot start or end with - ; "." can be used to separate different labels of the hostname. But gives no match for this regex: ^(a-zA-Z0-9|(?<!-)\.(?![-.]))[a-zA-Z0-9]+)?)$ ...

separate nginx log into database table-style fields

Valid only for something.cz, some-thing.cz, 2245exampl.cz ... Not-valid for -some.cz, here.com.cz ...

Unsatisfied with your email validation? Concerned about standards compliance? Worried about that one weird edge case? Want to stress-test your regex engine? This might be the regex for you!

e164_basic