preg_match_all特殊条件下的子域

Question

Update:

I'm using this regex:

/[^a-z^-^0-9^@^%^\/^:^\.^-]((?<!w\.)(?!w+\.)([0-9a-z][0-9a-z\-]*\.){2,}[a-z]+)(["|\s|<]|$)/i

The regex have a little problem when the string is only domains and nothing else, listed under each other in new lines

For example:

$string = 'sub84.example4.com
sub-example.example84.net
sub-84example.example-h1.org
www-example4124.domain.com
sub.example-www.com';

All domains should be matched, but he current regex is only match sub-example.example84.net and www-example4124.domain.com

I also looking to add some more conditions:

1) letters of domain must be small and can't be capital (the current one doesn't care about that) EX: Sub.example.Com is not ok.

2) No =SPACE (SPACE (" :SPACE before the domain and NO SPACE) or SPACE= ") SPACE: after it.

EX:

$string = '

text = sub1.example.com text
text ( sub2.example.com text
text sub3.example.com = text
text sub4.example.com ) text
text ("sub5.example.com text
text sub6.example.com") text
text : sub7.example.com text
text sub8.example.com : text

';

None of them is ok

3) Exclude .info .biz .tv tlds

Thank you.

Answer 1

I don't quite understand the purpose of doing this or the incredible number of conditions, but you might try this (rather really long one...):

(?<!http://)(?<!https://)(?<!www\.)(?![^\s<>]*[:@/])(?<![(=:] )(?<!\(")(?:(?<=[\s">])|^)(?:[a-z0-9-]+\.){2}(?!info|biz|tv)[a-z]+(?=[\s"<]|$)(?! [=):])(?!"\))

regex101 demo

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Breakdown:

(?<!http://)(?<!https://)(?<!www\.)        # Prevent http:// https:// and www.
(?![^\s<>]*[:@/])                          # Prevent : @ /
(?<![(=:] )(?<!\(")                        # Prevent '( ' '= ' etc
(?:(?<=[\s">])|^)                          # Ensure there's ' ', '>', '"' or beginning of line
(?:[a-z0-9-]+\.){2}(?!info|biz|tv)[a-z]+   # Main match, alphanumerics and -, 2 parts + tlds (excluding info, biz, tv
(?=[\s"<]|$)                               # Ensure there's ' ', '<', '"' or end of line
(?! [=):])(?!"\))                          # Prevent ' )' ' =' etc