[9.x] Proper fix when provided path is '0' #40050
Merged
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#40013 was incorrect, because when provided argument was '0',
we were appending
$path
(i.e. '0') instead ofDIRECTORY_SEPARATOR.$path
(i.e. '/0').To summarize the behavior after this PR:
'foo'
'/foo'
'0'
'/0'
''
(default)''
In addition, as I'm using a loose comparison, it supports the following cases (they are not supported nor expected, though it doesn't harm to work better with them):
null
''
false
''