i am working in regex my regex is /[([^]s]+).([^]]+)]/g
this works great in PHP for [http://sdgdssd.com fghdfhdhhd]
but when i use this regex for javascript it do not match with this input string
my input is [http://sdgdssd.com fghdfhdhhd]
i am working in regex my regex is /[([^]s]+).([^]]+)]/g
this works great in PHP for [http://sdgdssd.com fghdfhdhhd]
but when i use this regex for javascript it do not match with this input string
my input is [http://sdgdssd.com fghdfhdhhd]
In JavaScript regex, you must always escape the ]
inside a character class:
[([^]s]+).([^]]+)]
See the regex demo
JS parsed [^]
as *any character including a newline in your regex, and the final character class ]
symbol as a literal ]
.
In this regard, JS regex engine deviates from the POSIX standard where smart placement is used to match [
and ]
symbols with bracketed expressions like [^][]
.
The
]
character is treated as a literal character if it is the first character after^
:[^]abc]
.
In JS and Ruby, that is not working like that:
You can include an unescaped closing bracket by placing it right after the opening bracket, or right after the negating caret.
[]x]
matches a closing bracket or anx
.[^]x]
matches any character that is not a closing bracket or anx
. This does not work in JavaScript, which treats[]
as an empty character class that always fails to match, and[^]
as a negated empty character class that matches any single character. Ruby treats empty character classes as an error. So both JavaScript and Ruby require closing brackets to be escaped with a backslash to include them as literals in a character class.
Related:
(?1)
regex subroutine used to shorten a PCRE pattern conversion - REGEX from PHP to JS