Description:
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When filesize() is applied on a symbolic link to a file, it returns the size of the file pointed by it instead of returning the size of symlink itself. This is happening for both php5 and php6. Is this the valid behavior?

Reproduce code:
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<?php
$file_handle = fopen("test.tmp", "w");
fwrite( $file_handle, str_repeat("Hello World, this is 2007 year ....\n", 100) );
fclose($file_handle);

symlink("test.tmp", "test_symlink.tmp");  //creating symlink

var_dump( filesize("test_symlink.tmp") );  //size of the symlink itself
clearstatcache();
var_dump( filesize("test.tmp") );  //size of the file
clearstatcache();

unlink("test_symlink.tmp");
unlink("test.tmp");
?>


Expected result:
----------------
-sizeof(symlink)-
int(3600)

Actual result:
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int(3600)
int(3600)