Regex for htaccess greater than 10

Question

I'm not very good at regular expressions... The only thing I want to achieve is to match in the htaccess when the page number is greater than 10. I've tried the following regular expression:

^(\d\d\d*)$ 

but it matches 10, because it's the first two-digit number.

Any ideas? Thank you!

Answer 1

^(1[1-9]|[2-9]+\d+|1\d\d+)$

You may test it in https://regex101.com (it has great explanation for each step even)

I used scenarios: 9, 10, 11, 20, 009, 09, 300, 4445, 100

Explanation: the OR (|) operator separates 3 regex expressions:

• 1[1-9] - exactly 2 digits, 11 to 19
• [2-9]+\d+ Here:
  • [2-9]+ means 1 or more digits in range 2-9
  • \d+ - any digit 1 or more occurrence
• 1\d\d+ - 3 and more digit numbers starting with digit 1

Answer 2

You need

^(?:1[1-9]|[2-9]\d|[1-9]\d{2,})$

If you need to allow any amount of leading zeros, you may use

^0*(?:1[1-9]|[2-9]\d|[1-9]\d{2,})$

See the regex demo and the regex graph:

Details

• ^ - start of string
• (?:1[1-9]|[2-9]\d|[1-9]\d{2,}):
  • 1[1-9] - 11 to 19
  • | - or
  • [2-9]\d| - 20 to 99, or
  • [1-9]\d{2,} - 100 and more
• $ - end of string.