How to use regular expressions to verify bank card validity period in golang

When using Golang to verify the validity period of bank cards, we can use regular expressions to achieve it. Regular expression is a string matching tool that identifies strings that match a pattern by defining a specific pattern.

The bank card validity period usually includes two parts: month and year. The month should be a two-digit number between 01 and 12, and the year should be a year between the current year and the next 10 years.

We can use the following regular expression to verify the bank card validity period:

^[0-9]{2}/(?:1[6-9]|[2-9][0-9])$

This regular expression can be divided into two parts. The first part ^[0-9]{2}/ matches two numbers and a slash to identify the month. The second part (?:1[6-9]|[2-9][0-9])$ matches a year, which can be 16 to 99 or 2000 to 2099.

Next we can use this regular expression in Golang:

package main

import (
    "fmt"
    "regexp"
)

func main() {
    re := regexp.MustCompile(`^[0-9]{2}/(?:1[6-9]|[2-9][0-9])$`)

    result := re.MatchString("06/23")
    fmt.Println(result)

    result = re.MatchString("12/2022")
    fmt.Println(result)

    result = re.MatchString("13/25")
    fmt.Println(result)
}

In this example, we first call the regexp.MustCompile function to compile the regular expression. Then we can use the MatchString function to verify whether the string matches the regular expression pattern. Calling the MatchString function returns a Boolean value indicating whether the string matches the regular expression.

Finally, we can see the output in the console. The first and second strings both match the regular expression pattern, but the third string does not.

Using regular expressions can make bank card validity verification easier and more convenient. When writing regular expressions, we need to carefully consider the rules for bank card validity and ensure that the regular expression can correctly identify strings that comply with the rules.

The above is the detailed content of How to use regular expressions to verify bank card validity period in golang. For more information, please follow other related articles on the PHP Chinese website!