String replacement using regular expressions

javascript.js

var results = 'hi bob123';

results = results.replace(/bob\d+/, 'cooper');

php.php

<?php
$results = 'hi bob123';
$results = preg_replace('/bob\d+/', 'cooper', $results);

python.py

import re

results = 'hi bob123'
results = re.sub('bob\d+', 'cooper', results)