Perl正则表达式URL包含字符串但不相似

Question

I need to write regex for Perl so that it matches /contact (and everything beyond so /contact/talk etc.).

But I also have URL for /contacts so I want it to skip this.

So far I've only been able to write code either for exact matches or for

So something along the lines of:

if ($uri =~ m/contact/i ) {
   ## Redirect somewhere
}

This also redirects everything within /contacts though which is where I'm struggling.

Answer 1

if ($uri =~ m!/contact(?:/|$)!) {
  #
}

Answer 2

if ($uri =~ m/\/contact(?:$|\/)/i ) {
  ## Redirect somewhere
}

Will match /contact because of the $ , and everything like /contact/...

Answer 3

\\b is a word boundary marker, which prevents this match from being in the middle of a word:

if ($uri =~ m|\bcontact\b|i ) {
   ## Redirect somewhere
}

I would add it to the beginning and end, so you don't match foocontact either. Or you could make sure that a slash precedes contact.

if ($uri =~ m|/contact\b|i ) {
   ## Redirect somewhere
}

Answer 4

Try:

echo -e "/contacts/qqq\n/contact\n/contact/talk\n/ConTact\n/contactx/"|
perl -ne 'm{/contact(?:/|$)} and print'

Output:

/contact
/contact/talk

Answer 5

/^\/contact\//

涉及一些猜测-您的网址似乎以/contact开头，以防万一，请删除初始插入符号。