Php regex help

[getmizanur]

elloo,

 

i had a php test today and had to find what was wrong with the following regex

 

preg_match('/^(?:ftp://)?([^/]+)@i');

 

my answer

 

preg_match('/^(?:ftp:\/\/)?([^/]+@/i');

 

can anyone tell me if i'm correct or not.

 

and just for understanding, can anyone explain to me what this means (?:ftp://)?([^/]+)

[cags]

It's very difficult to say without knowing what it's supposed to match, but are you sure that's the answer you put? Because it is slightly incorrect. You are missing a closing bracket.

 

/ - Opening delimiter

^ - Anchor pattern at the start

(?:ftp:\/\/)? - A non-capture group to optionally match ftp://

([^/]+)@ - Capture one or more characters that isn't a forward slash, followed by an @

/i - The ending delimiter and the case-insensitive modifier

[.josh]

you're also missing a subject...

[ZachMEdwards]

(?:ftp://)?([^/]+)

 

Match the regular expression below «(?:ftp://)?»

  Between zero and one times, as many times as possible, giving back as needed (greedy) «?»

  Match the characters “ftp://” literally «ftp://»

Match the regular expression below and capture its match into backreference number 1 «([^/]+)»

  Match any character that is NOT a “/” «[^/]+»

      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»