getimagesize() won't work on my site (PHP) -

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i used getimagesize() size of .swf file on xampp localhost server , worked. when apply on site. doesn't output anything.

so made test page see if react same way , did. echo width see if gets result @ all, , on localhost, gives me output of 800. when use on site, gives no output @ all...

<?php    	$url= "http://cache.armorgames.com/files/games/sugar-sugar-3-17769.swf";	  	$tst = getimagesize($url);  	echo $tst[0];    ?>

is there reason why wouldn't work? makes no sense me.

i wrote out blank php file , used getimagesize() on url posted , returned expected array of results. how looked @ php error log see if there other underlying errors preventing output? print_r() or var_dump() give anything?

  array (     [0] => 800     [1] => 600     [2] => 13     [3] => width="800" height="600"     [mime] => application/x-shockwave-flash )

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