Use regular expressions in golang to verify whether the input is a legal social security card number

Nowadays, people pay more and more attention to the protection of personal information. Social security card number is one of the important personal information for everyone. Legal social security card numbers have certain format requirements. How to use regular expressions in golang to verify the entered social security card numbers will be introduced in detail in this article.

1. Format of social security card number

The social security card number is composed of 18 digits and letters, usually starting with a number and ending with a letter. Among them, there are specific check codes in the 6th, 7th, 8th, 17th and 18th digits. The specific rules are as follows:

1. Digits 1-2: Indicates the administrative division code of the card issuance area, consisting of Allocated uniformly by the State Council.
2. Digits 3-4: Indicates the unit code of the card-issuing area, which is uniformly assigned by the local social security agency.

3. Digits 5-6: Indicates the branch code of the card-issuing area, which is uniformly assigned by the local social security agency.

4. Digits 7-14: Indicates the personal information of the social security card holder, including name, gender, date of birth, birth order, etc.

5. Digits 15-16: Indicates the issuer code of the social security card, which is uniformly assigned by the State Council.

6. The 17th bit: indicates the check code bit, which is calculated from the 1st to 16th bits according to certain rules.

7. The 18th bit: indicates the card verification code, calculated through the Luhn algorithm.

2. Use regular expressions in golang to verify social security card numbers

Use regular expressions in golang to verify social security card numbers. You can use regular expression strings for matching. The specific code is as follows ：

package main
import (
    "fmt"
    "regexp"
)
func main() {
    card := "110102199001018472"
    match, _ := regexp.MatchString(`^(d{2})(d{2})(d{2})(d{8})(d{2})(d{1})([0-9a-zA-Z])$`, card)
    if match {
        fmt.Printf("%v 是一个合法的社保卡号码
", card)
    } else {
        fmt.Printf("%v 不是一个合法的社保卡号码
", card)
    }
}

In the above code, the regexp package in golang is used to operate regular expressions. For regular expression strings, you can set them according to the format rules of social security card numbers, where:

1. d represents a number, and {n} represents n numbers.
2. () represents a set of data, and one of the data can be retrieved through $1 and $2.
3. [0-9a-zA-Z] represents letters or numbers.

After the above code is implemented, the entered social security card number can be matched with regular expressions to determine whether the card number is legal.

Conclusion:

Through the introduction of this article, we can learn how to use regular expressions in golang to verify whether the social security card number is legal. For developers, regular expressions are a very important tool. By using regular expressions appropriately, unnecessary errors and program vulnerabilities can be reduced, and the robustness and reliability of the code can be improved.

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