Regular Expressions to Match Social Media Accounts

This repository lists regular expressions to match and check is valid of social media accounts. i added examples code for PHP, Ruby, Java, Swift, C#, VBNET, Python & Javascript languages ..

Github username

PHP and Ruby

/^(?!.*\-\-|.*\-$|.*\_)[a-zA-Z0-9][\w-]+[a-zA-Z0-9]{0,39}$/

Java & Swift

^(?!.*\\-\\-|.*\\-$|.*\\_)[a-zA-Z0-9][\\w-]+[a-zA-Z0-9]{0,39}$

C# & VBNET

^(?!.*\-\-|.*\-$|.*_)[a-zA-Z0-9][\w-]+[a-zA-Z0-9]{0,39}$

Python

^(?!.*\-\-|.*\-$|.*\_)[a-zA-Z0-9][\w-]+[a-zA-Z0-9]{0,39}$

Javascript

/^(?!.*\-\-|.*\-$|.*\_)[a-zA-Z0-9][\w-]+[a-zA-Z0-9]{0,39}$/i

Rules :

- Matches with one hyphen (sule-alothman) but not consecutive hyphens (sule--alothman) but can added many hyphens between char and char (sule-al-othman).
- Starting period not matched (-sulealothman).
- Ending period not matched (sulealothman-).
- Not matched underscore (sule_alothman).
- Max characters 39 char.

Twitter username

PHP & Ruby

/^[A-z0-9]{0,15}$/

Java, Swift and Python

^[A-z0-9]{0,15}$

C# & VBNET

/^[A-z0-9_]{0,15}$/

Javascript

/^[A-z0-9]{0,15}$/i

Rules :

- Allowed for usernames are alphanumeric characters and underscores.

Instagram username

PHP and Ruby

/^(?!.*\.\.|.*\.$)[A-z0-9][\w.]+[A-z0-9]{0,30}$/

Java & Swift

^(?!.*\\.\\.|.*\\.$)[A-z0-9][\\w.]+[A-z0-9]{0,30}$

C#, VBNET & Python

^(?!.*\.\.|.*\.$)[A-z0-9][\w.]+[A-z0-9]{0,30}$

Javascript

/^(?!.*\.\.|.*\.$)[A-z0-9][\w.]+[A-z0-9]{0,30}$/i

Rules :

- Matches with one point (sule.alothman) but not consecutive points (sule..alothman) and can added many points between char and char (sule.al.othman).
- Starting period not matched (.sulealothman).
- Ending period not matched (sulealothman.).
- Match underscores (_sule_alothman_).
- Max characters 30 char.

Snapchat username

PHP and Ruby

/^(?!.*\.\.|.*\_\_|.*\-\-)(?!.*\.$|.*\_$|.*\-$)(?!.*\.\-|.*\-\.|.*\-\_|.*\_\-|.*\.\_|.*\_\.)[a-zA-Z]+[\w.-][0-9A-z]{0,15}$/

Java & Swift

^(?!.*\\.\\.|.*\\_\\_|.*\\-\\-)(?!.*\\.$|.*\\_$|.*\\-$)(?!.*\\.\\-|.*\\-\\.|.*\\-\\_|.*\\_\\-|.*\\.\\_|.*\\_\\.)[a-zA-Z]+[\\w.-][0-9A-z]{0,15}$

C# & VBNET

^(?!.*\.\.|.*__|.*\-\-)(?!.*\.$|.*_$|.*\-$)(?!.*\.\-|.*\-\.|.*\-_|.*_\-|.*\._|.*_\.)[a-zA-Z]+[\w.-][0-9A-z]{0,15}$

Python

^(?!.*\-\-|.*\-$|.*\_)[a-zA-Z0-9][\w-]+[a-zA-Z0-9]{0,39}$

Javascript

/^(?!.*\.\.|.*\_\_|.*\-\-)(?!.*\.$|.*\_$|.*\-$)(?!.*\.\-|.*\-\.|.*\-\_|.*\_\-|.*\.\_|.*\_\.)[a-zA-Z]+[\w.-][0-9A-z]{0,15}$/i

Rules :

- Matches with one symbol include in username (dot | undersocre | hyphen) (sule-alothman | sule.alothman| sule_alothman) but not consecutive symbols (sule--alothman | sule._alothman .. etc).
- Usernames must start with a letter.
- Usernames must end in a letter or number.
- Max characters 15 char.