phone regex with length validation in php

as per the specification phone number should be

Alhpa-Numeric, Space allowed, hypen allowed, bracket allowed, max length = 45 can be null as well.

below is what i made using my limited knowledge and examples but its giving

error : Compilation failed: nothing to repeat at offset 29

My PHONE regex =


please guide what should i do to have all the above specification matched using regex. thanks


The regex won't match what you want, with ([a-zA-Z0-9][\s\(\)\-]) each number must be followed by a space, parentheses or hyphen. to fix that make [\s\(\)\-] optional:


and use preg_match.

Remove the *. The {0,45} defines the number of repeats allowed.

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