search
HomeBackend DevelopmentPHP TutorialPHP regular expression method to verify the validity and gender of ID number

PHP regular expression method to verify the validity and gender of ID number

Jun 24, 2023 am 09:36 AM
phpregular expressiongenderidentification numbereffectiveness.

The ID card number is an important symbol for the identification of residents in our country. It can be used for identity verification on many occasions. In the application, in order to ensure the validity and accuracy of the ID number, it needs to be verified by regular expressions. This article will introduce how to use PHP regular expressions to verify the validity and gender of the ID number.

1. The composition and rules of the ID number

The ID number is composed of 18 digits or 17 digits plus 1 check code. Among them, the first 17 digits represent the ID card holder's information, and the last 1 digit represents the verification code, which is used to verify the correctness of the ID card number.

The rules for ID numbers are as follows:

  1. The first 6 digits are the area code, indicating the administrative region where the ID card holder is located.
  2. The next 8 digits are the birth date code, which represents the birth date of the ID card holder. The format is a six-digit number, of which the first two digits represent the year of birth and the last four digits represent the month and day of birth.
  3. The 17th digit is the gender code, odd numbers represent men, and even numbers represent women.
  4. The last digit is the check code, which is used to verify the correctness of the ID number.

2. Use regular expressions to verify the ID number

Using regular expressions can easily verify the validity of the ID number. The following is a simple regular expression example:

$pattern = '/^[1-9]d{5}(19|20)d{2}(0[1-9]|1[012])(0[1-9]|[12][0-9]|3[01])d{3}[0-9Xx]$/';
$code = '110101199001011234';
if (preg_match($pattern, $code)) {
    echo '身份证号码有效';
} else {
    echo '身份证号码无效';
}

The rules of this regular expression are consistent with the rules of the ID number, and some qualifiers and character classes are used. Among them, ^ represents the beginning of the string, and $ represents the end of the string. [1-9] means that the first digit cannot be 0, and d{5} means that the next 5 digits are numbers. (19|20) indicates that the birth year of the ID card holder is a number starting with 19 or 20. (0[1-9]|1[012]) represents the number of birth month 01-12. (0[1-9]|12|3[01]) represents a number whose birth date is 01-31. d{3} means the last three digits can be any number, [0-9Xx] means the last digit is a number or letter X. Using this regular expression, you can easily verify the validity of the ID number.

3. Use regular expressions to verify the gender of the ID number

The 17th digit of the ID number represents the gender of the ID card holder, odd numbers represent male, and even numbers represent female. Through regular expressions, you can easily extract the 17th digit of the ID number and determine its gender.

The following is a simple example:

$pattern = '/^[1-9]d{5}(19|20)d{2}(0[1-9]|1[012])(0[1-9]|[12][0-9]|3[01])(d{3})[0-9Xx]$/';
$code = '110101199001011234';
if (preg_match($pattern, $code, $matches)) {
    $sex = $matches[6] % 2 == 0 ? '女' : '男';
    echo '性别为' . $sex;
} else {
    echo '身份证号码无效';
}

This regular expression is the same as the previous one, except that there is an additional capture group (d{3}), which is used to capture the first digit of the ID number. 17 bits. Use the $matches variable to get the captured information and determine the gender based on the parity of the 17th position.

To sum up, by using simple regular expressions, you can easily verify the validity of the ID number and extract gender information. In practical applications, if more stringent and detailed verification rules are required, they can be adjusted and improved according to actual needs.

The above is the detailed content of PHP regular expression method to verify the validity and gender of ID number. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
PHP's Purpose: Building Dynamic WebsitesPHP's Purpose: Building Dynamic WebsitesApr 15, 2025 am 12:18 AM

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP: Handling Databases and Server-Side LogicPHP: Handling Databases and Server-Side LogicApr 15, 2025 am 12:15 AM

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

How do you prevent SQL Injection in PHP? (Prepared statements, PDO)How do you prevent SQL Injection in PHP? (Prepared statements, PDO)Apr 15, 2025 am 12:15 AM

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python: Code Examples and ComparisonPHP and Python: Code Examples and ComparisonApr 15, 2025 am 12:07 AM

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP in Action: Real-World Examples and ApplicationsPHP in Action: Real-World Examples and ApplicationsApr 14, 2025 am 12:19 AM

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP: Creating Interactive Web Content with EasePHP: Creating Interactive Web Content with EaseApr 14, 2025 am 12:15 AM

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python: Comparing Two Popular Programming LanguagesPHP and Python: Comparing Two Popular Programming LanguagesApr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

The Enduring Relevance of PHP: Is It Still Alive?The Enduring Relevance of PHP: Is It Still Alive?Apr 14, 2025 am 12:12 AM

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version