或匹配的正则表达式

Question

I have a string which could end with either

"/"

or

"/?secure=true"

I need to validate it. I tried this

\b(/(/?secure=true)?)\b

but I get no matches found with the regex. However, with

^(/(\$secure=true)?)$

match is found. But this wont help in my case as the string that I want to validate will be prefixed with chars something like "thisismystring/" or "thisismystring/?secure=true" .

I want to know how to go about this.

Answer 1

You need to use the pipe symbol (|) to specify an or:

(/|/\?secure=true)$

You also need to escape the question mark, as here, and should specify the "$" for end of string but not the "^" for start of string.

Answer 2

Both cases would contain the

/

So that should not be in the optional part.

You put the optional part in ()?

and escape the question mark with backslash

/(\?secure=true)?

And to indicate that it should end with that, you put $ at the end

/(\?secure=true)?$

Answer 3

可以这样做：

/(\?secure=true)?$