Regular Expressions 101

Allow get the value of the some attributes from a html text

following input formats work-- 10am to 3pm 1am - 2pm 12pm-3pm

US numbers only

PHP

Validate Phone number even if contain country code

This expression converts any 3- or 4 digit timevalue to a value with colon between hours and minutes. So 345 is converted to 3:45 and 1500 is converted to 15:00

Nickname validation. Only: letters _ One line. Tested with RoR

this is the most perfect pattern I reach for url with query or anchor

insert[\s]+into[\s]+\([\s](?.?)[\s]\)[\s]+values[\s]+\((?.?)[\s]*\);

Exist a problem with simple regex in JS Solution from: https://www.safaribooksonline.com/library/view/regular-expressions-cookbook/9781449327453/ch09s10.html