Here is a collection of useful Regex patterns that I have either come up with or have found on the internet. Enjoy.
Legend:
^[A-Z]+ # starts with at least one capital letter s? # followed by an optional space d+ # followed by one or more digits /x ^d+ # starts with one or more digits . # followed by a single decimal /x s # and a space /x d{4} # then four numbers - year - # connected with a dash
To filter a string to make sure it's a valid ip address this regexp is quite useful. /^((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9]).){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])$/
And this one for mac addresses ^([[:xdigit:]]{2}:){5}[[:xdigit:]]{2}$
Extract web address from a string ((?:http|ftp)s?://)?(((([d]+.)+){3}[d]+(/[w./]+)?)|([a-z]w*((.w+)+){2,})([/][w.~]*)*)
matches a number: interger or float, scientific notation or plain, plus or minus... [-+]?(?:b[0-9]+(?:.[0-9]*)?|.[0-9]+b)(?:[eE][-+]?[0-9]+b)?
Valid Phone Number Validation that allows extensions and virtually all the common ways to list a (US) number: /^[01]?[-s.]?(?[2-9][0-9]{2})?([-s.]|(s-s))?[0-9]{3}([-s.]|(s-s))?[0-9]{4}s?(([xX].?|(ext|EXT).?|s)?s?(?<![0-9])[0-9]{1,4})?$/
