How do I convert the Regex to laravel format

I am working on to validate pone no as well as land phone no,

I got the regex from another SO post.

 (?:\s+|)((0|(?:(\+|)91))(?:\s|-)*(?:(?:\d(?:\s|-)*\d{9})|(?:\d{2}(?:\s|-)*\d{8})|(?:\d{3}(?:\s|-)*\d{7}))|\d{10})(?:\s+|)

But I sure that laravel doesn't accept this format and as expected I got error,

preg_match(): No ending delimiter '/' found

I am new to Regex, Could some one please help me with the conversion,

via Chebli Mohamed