How the regular expression matches characters outside of www

Think for a long time Leng didn't want to come out [^w]{3}? Expert guidance

Reply to discussion (solution)

How do I match a character other than www?
(?! WWW) is that what it means?

How do I match a character other than www?
(?! WWW) is that what it means?
I want to match the two-level domain name except the beginning of www (?! WWW) What does this mean, WWA will be matched?

Test instructions description is not clear.
If WWW does not match, and WWW1 matches.

You can write it like this:
^(?! www$). *

!--? phpvar_dump (Preg_match ('/^ (?! www$). */', "www", $match)); Var_dump (Preg_match ('/^ (?! www$). */', "1www", $match)); Var_dump (Preg_match ('/^ (?!  www$). */', "WWW11", $match));   
 The result is 0 1 1 
 
 
 
 How do I match a character other than www? 
 (?!  WWW) is that what it means? 
 I want to match the two-level domain name except the beginning of www (?!  WWW) What does this mean, WWA will be matched? 
 will not be matched 
 
 
 How do I match a character other than www? 
 (?!  WWW) is that what it means? 
 I want to match the two-level domain name except the beginning of www (?!  WWW) What does this mean, WWA will be matched? 
 
 Landlord to learn PHP's regular "negative order look around" know how to match the 
 
 
 
 How to match the characters outside www? 
 (?!  WWW) is that what it means? 
 I want to match the two-level domain name except the beginning of www (?!  WWW) What does this mean, WWA will be matched? 
 
 Landlord to learn about PHP's regular "negative order look around" know how to match the 
 ask the $ is not the end of the match what to put in here what usage 
 
 (?! www$) 
 $ is the end of the match meaning Ah, but (?! www$) This represents the assertion that the assertion does not have a "www end" and asserts that it does not occupy a matching space. 
 
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