How to match only the ip and not letters

Question

I am trying to parse an error log with regex. It will give me everything I want but now I want to omit the text "client", or any text that would be in that place. All I want from between the [] is the ip address.

^\[([^]]+)\]\s*\[([^]]+)\]\s*\[([^]]+)\]\s*([A-Za-z ]*)[:]\s*([\/a-z-]*)$

Here is a line from the log.

[Mon Aug 23 15:25:35 2010] [error] [client 80.154.42.54] File does not exist: /var/www/phpmy-admin

Answer 1

This should do it:

^\[([^]]+)\]\s*\[([^]]+)\]\s*\[[a-zA-Z ]*([0-9.]+)\]\s*([A-Za-z ]*)[:]\s*([\/a-z-]*)$

Working regex example:

http://regex101.com/r/uN3fO3

Matches: (Using your example data..)

1. `Mon Aug 23 15:25:35 2010`
2. `error`
3. `80.154.42.54`
4. `File does not exist`
5. `/var/www/phpmy-admin`