Tips for extracting ID card information using PHP regular expressions

Tips for extracting ID card information using PHP regular expressions

In actual development, the need to extract ID card information is often used. The ID number is a string containing a lot of information, including region, birthday, gender and other information. In PHP, we can extract ID card information through regular expressions. The following will introduce specific techniques and provide code examples to help you understand better.

1. Extract the regional information from the ID number

The first 6 digits of the ID number represent the regional information. We can extract this part of the information through regular expressions. The following is a code example to extract regional information:

$id_card_number = '510124199001012345'; // 模拟一个身份证号码
$pattern = '/^(d{2})(d{2})/'; // 匹配前两位和后两位数字
preg_match($pattern, $id_card_number, $matches);
$province_code = $matches[1];
$city_code = $matches[2];
echo "地区信息：省份代码 $province_code, 城市代码 $city_code";

2. Extract the birthday information in the ID number

The birthday information of the ID number is usually from the 7th to the 7th 14 bits, format is YYYYMMDD. We can extract birth date information through regular expressions. The following is a code example to extract birthday information:

$id_card_number = '510124199001012345'; // 模拟一个身份证号码
$pattern = '/^(d{6})(d{8})/'; // 匹配生日部分
preg_match($pattern, $id_card_number, $matches);
$birthday = $matches[2];
echo "生日：$birthday";

3. Extract the gender information from the ID number

The second to last digit of the ID number represents gender information, and odd numbers are Male, even numbers are female. We can extract gender information through regular expressions. The following is a code example for extracting gender information:

$id_card_number = '510124199001012345'; // 模拟一个身份证号码
$pattern = '/d{16}(d{1})/'; // 匹配倒数第2位数字
preg_match($pattern, $id_card_number, $matches);
$gender_code = $matches[1];
$gender = $gender_code % 2 == 0 ? '女' : '男';
echo "性别：$gender";

Through the above code example, you can learn how to use PHP regular expressions to extract ID card information. Remember to adjust according to the different rules of the ID card number in actual applications to ensure that the required information is accurately extracted. Hope this article helps you!

The above is the detailed content of Tips for extracting ID card information using PHP regular expressions. For more information, please follow other related articles on the PHP Chinese website!