regex - Phone regular expression with dots and slashes -

i have simple regular expression check phone numbers: \+?(?:\d ?){7,20}

it´s working phones like:

• 0034 123 456 789
• +34123456789

and mix of that.

i include extend validation detecting "." or "-". example:

• 0034.123.456.789
• 123-456-789

you can use character class instead of final space of non-matching group :

\+?(?:\d[ .-]?){7,20}