从字符串中检索数字字符

import re

string = "Hello123World456"
pattern = r'\d+'

numbers = re.findall(pattern, string)
print(numbers)  # ['123', '456']

const string = "Hello123World456";
const pattern = /\d+/g;

const numbers = string.match(pattern);
console.log(numbers);  // ['123', '456']

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] args) {
        String string = "Hello123World456";
        String pattern = "\\d+";

        Pattern p = Pattern.compile(pattern);
        Matcher m = p.matcher(string);

        while (m.find()) {
            System.out.println(m.group());
        }
    }
}

$string = "Hello123World456";
$pattern = '/\d+/';

preg_match_all($pattern, $string, $matches);
print_r($matches[0]);  // ['123', '456']