Use regular expressions in golang to verify whether the input is a legal license plate number

License plate number is of great significance in traffic management, so it must meet certain format requirements. In golang, you can use regular expressions to verify whether the input is a legal license plate number. The following is a detailed introduction.

Regular expression is a powerful text matching tool that can be used to match strings in various formats. In golang, using regular expressions is very simple. You only need to call the relevant functions in the regexp package. In verifying the license plate number, the following format needs to be matched:

1. Starts with a Chinese character, followed by one letter and five digits
2. Starts with a letter, followed by five digits and one letter
3. Starts with the word "Shi", followed by six numbers and one letter
4. Starts with the word "Ling", followed by one letter and six numbers

According to the above format requirements, the following regular expression can be constructed:

^[\u4e00-\u9fa5][A-Z]\d{5}$|^[A-Z]\d{5}[A-Z]$|^\u4f7f\d{6}[A-Z]$|^\u9886[A-Z]\d{6}$

Among them, "^" represents the starting position of the matching string, and "$" represents the end position of the matching string. The characters in square brackets are the matching character set, and "\u4e00-\u9fa5" represents the Chinese character set. The number in the curly brackets indicates a specific number of times to match the character. For example, "\d{5}" indicates matching 5 digits. The vertical bar "|" indicates the relationship of OR, that is, it only needs to conform to one of the formats.

Next, you can use the regular expression for verification in golang. The sample code is as follows:

package main

import (
    "fmt"
    "regexp"
)

func main() {
    reg := regexp.MustCompile(`^[\u4e00-\u9fa5][A-Z]\d{5}$|^[A-Z]\d{5}[A-Z]$|^\u4f7f\d{6}[A-Z]$|^\u9886[A-Z]\d{6}$`)
    plateNum := "苏A12345"
    if !reg.MatchString(plateNum) {
        fmt.Printf("%s 不是合法的车牌号码
", plateNum)
    } else {
        fmt.Printf("%s 是合法的车牌号码
", plateNum)
    }
}

In the above code, first use the regexp.MustCompile function to compile the regular expression into Available regular objects, and then call the MatchString method to match. If the match is successful, it is a legal license plate number.

In short, it is very convenient to use regular expressions to verify the legality of license plate numbers. Through the above example code, you can easily verify the validity of license plate numbers, improve the efficiency of traffic management, and ensure road safety.

The above is the detailed content of Use regular expressions in golang to verify whether the input is a legal license plate number. For more information, please follow other related articles on the PHP Chinese website!