Description:
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Currently glob() function returns an array containing the matched files/directories or FALSE on error. There is GLOB_ONLYDIR flag to return only directory entries which match the pattern, but no GLOB_ONLYFILES to get the opposite.


Reproduce code:
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Valid flags: 

GLOB_MARK - Adds a slash to each item returned 
GLOB_NOSORT - Return files as they appear in the directory (no sorting) 
GLOB_NOCHECK - Return the search pattern if no files matching it were found 
GLOB_NOESCAPE - Backslashes do not quote metacharacters 
GLOB_BRACE - Expands {a,b,c} to match 'a', 'b', or 'c' 
GLOB_ONLYDIR - Return only directory entries which match the pattern 


Expected result:
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$files = glob("dir/*", GLOB_ONLYFILES);

Actual result:
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$files = array_diff(glob("dir/*"), glob("dir/*", GLOB_ONLYDIR));