CLdapUtil::GetImgTypeBySignature

static function GetImgTypeBySignature($signature)
{
	if($signature == "")
		return false;

	$signature = mb_substr($signature, 0, 12);

	$arSigs = array(
		"GIF" => "gif",
		"xffxd8xff" => "jpg",
		"x89x50x4e" => "png",
		"FWS" => "swf",
		"CWS" => "swc",
		"8BPS" => "psd",
		"BM" => "bmp",
		"xffx4fxff" => "jpc",
		"IIx2ax00" => "tif",
		"MMx00x2a" => "tif",
		"FORM" => "iff",
		"x00x00x01x00" => "ico",
		"x0dx0ax87x0a" => "jp2"
		);

	foreach ($arSigs as $sig => $type)
		if(preg_match("/^".$sig."/x", $signature))
			return $type;

	return false;
}