替换用户代理中的所有“.net clr”

Question

I am learning regex and I am testing some string lookup/replacement on the user agent.

I have few user agent with:

• .NET CLR 11432
• .NET CLR 2.0.2648
• .NET CLR 1.0.1369
• .NET CLR 2.0.90283

I can replace the ".net clr \d" but it does no work properly.

  $ua = 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 4.1; .NET CLR 12858)';

  $r = preg_replace('/.NET CLR \d/i', '', $ua);

  var_dump($r);

and i get:

Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 4.1; 2858; .0.6143)

clearly i am missing something, but what?

thanks

Answer 1

Your regex doesn't adhere to the decimal point of the version number, that's why it's matching everything up until the .. Change you regex to this:

$r = preg_replace('/\.NET CLR [\d\.]+/i', '', $ua);