Question: I need to match phone numbers that :

* start with 010 or 012 or 016 or 019
* Consist of 10 numbers exactly

Can you please help me on how to match numbers using PHP and regex?

Answer: 
```
return preg_match('/^01[0269]\\d{7}$/', $theStringToTest);

```

This will match 0, 1, one of (0, 2, 6, 9), and then any 7 numbers (3+7==10). The `^` means start of string and `$` means end of string.
I think I'd use `^01[0269][0-9]{7}$`