ContainLower check if the string contain at least one lower case letter a-z.

ContainUpper check if the string contain at least one upper case letter A-Z.

IsAllLower check if the string is all lower case letters a-z.

IsAllUpper check if the string is all upper case letters A-Z.

IsASCII checks if string is all ASCII char.

IsEmptyString check if the string is empty.

IsFloat check if the value is float(float32, float34) or not.

IsFloatStr check if the string can convert to a float.

IsInt check if the value is integer(int, unit) or not.

IsIntStr check if the string can convert to a integer.

IsIp check if the string is a ip address.

IsIpV4 check if the string is a ipv4 address.

IsIpV6 check if the string is a ipv6 address.

IsJSON checks if the string is valid JSON.

IsNumber check if the value is number(integer, float) or not.

IsNumberStr check if the string can convert to a number.

IsPort check if the string is a valid net port.

IsPrintable checks if string is all printable chars.

IsRegexMatch check if the string match the regexp.

IsStrongPassword check if the string is strong password, if len(password) is less than the length param, return false Strong password: alpha(lower+upper) + number + special chars(!@#$%^&*()?><).

IsUrl check if the string is url.

IsWeakPassword check if the string is weak password Weak password: only letter or only number or letter + number.

RegexMatch check if the string match the regexp.