php image_type_to_mime_type
image_type_to_mime_type - 获取MIME的图像类型和getimagesize返回类型，exif_read_data，exif_thumbnail，本函数
$filename = 'http://111cn.net/banner/banner.gif';
$size = getimagesize($filename);
switch ($size['mime']) {
case "image/gif":
echo "Image is a gif";
break;
case "image/jpeg":
echo "Image is a jpeg";
break;
case "image/png":
echo "Image is a png";
break;
case "image/bmp":
echo "Image is a bmp";
break;
}
?>
print image_type_to_mime_type(IMAGETYPE_ICO);
// returns: application/octet-stream
?>
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