Description:
------------
While trying to create a copy of an existing dir by copy() function, it creates a file which is not expected but returns FALSE as expected. Even for an existing file as second argument, PHP doesn?t throw any warning message. It happens against Linux, and works fine against Windows.

Reproduce code:
---------------
<?php
mkdir("copy");
mkdir("copy1");
fclose( fopen("copy.tmp", "w") );

var_dump( copy("copy", "copy1") );  //copying dir to existing dir, throws a Warning msg as expected
var_dump( copy("copy.tmp", "copy") );  //copying file to a dir, throws a warning msg as expected

var_dump( copy("copy", "copy_copy") );  //copying dir to non-existing dest, copy returns FALSE but creates a file & no warning msg
var_dump( copy("copy", "copy_dir.tmp") );  //copying dir to non-existing file, copy returns FALSE but creates a file & no warning msg
var_dump( copy("copy", "copy.tmp") );  //copying dir to an existing file, copy returns FALSE but no warning msg

unlink("copy_copy");
unlink("copy_dir.tmp");
unlink("copy.tmp");
rmdir("copy1");
rmdir("copy");
?>


Expected result:
----------------
Creation of file is not expected and a required warning messages are expected.

Actual result:
--------------
Warning: copy(copy1): failed to open stream: Is a directory in %s on line %d
bool(false)

Warning: copy(copy): failed to open stream: Is a directory in %s on line %d
bool(false)
bool(false)
bool(false)
bool(false)