Description:
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i use function basename and pathinfo proess chinese filename, 

$filename = "D:\\ftpserver\\?м???????ѧ?ڶ?ʮһ??.wmv";

echo basename($filename);

result is : .wmv


$at = pathinfo($filename);
echo $at['basename'];

reseult is : .wmv

is not ?м???????ѧ?ڶ?ʮһ??.wmv




Reproduce code:
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$filename = "D:\\ftpserver\\?м???????ѧ?ڶ?ʮһ??.wmv";

echo basename($filename);

$at = pathinfo($filename);
echo $at['basename'];

Expected result:
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?м???????ѧ?ڶ?ʮһ??.wmv

Actual result:
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.wmv