正则表达式：如何验证路径不包含//

Question

I need help to create a regex (for JavaScript .match and PHP preg_match) that validates a unix type absolute path to a file (with international characters such as åäöøæð and so on) so that:

1. /path/to/someWhere is valid
2. /path/tø/sömewhere is valid
3. /path/to//somewhere is invalid
4. path/to/somewhere is invalid
5. /path/to/somewhere/ is invalid

The regex needs to handle paths regardless of their depth (/path/to or /path/to/somewhere or /path/to/somewhere/else)

I have a regexp that marks 1 to 3 as valid /^\/.+[^\/]$/ , the problem is to make this regex not to mark 3 as valid as it contains // without any other character in between.

Answer 1

A Solution for PHP:

    $lines =  array(
        "/path/to/someWhere",
        "/path/tø/sömewhere",
        "/path/to//somewhere",
        "path/to/somewhere",
        "/path/to/somewhere/",
    );

    foreach($lines as $line){
        var_dump(preg_match('#^(/[^/]+)+$#',$line)); // dumps int(1) int(1) int(0) int(0) int(0) 
    }