php 取得 swf 大小

$swfinfo = getimagesize("C:/wwwroot/mainstar.swf");
print_r($swfinfo);

/*
Array(
[0] => 188
[1] => 220
[2] => 13
[3] => width="188" height="220"
[mime] => application/x-shockwave-flash
)
*/