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Regular expression

Joveice
By Joveice
in Programming
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^[a-zA-Z0-9\._-]+$

 

This site is pretty useful at breaking things down: https://regex101.com/

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Hi I'm trying to use regular expression to check usernames. I know I need it and basic how it works, but no idea how to write it.

I need one that allows a-z A-Z 0-9 _ - . and nothing more no space and all in one word.

Found this site http://regexr.com/ which somewhat explains it tho it wasent enough for me to understand it.

Back-end developer, electronics "hacker"

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^[a-zA-Z0-9\._-]+$

 

This site is pretty useful at breaking things down: https://regex101.com/

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