我目前有一个过滤系统如下:
// Check to see if the type of file uploaded is a valid image type
function is_valid_type($file)
{
// This is an array that holds all the valid image MIME types
$valid_types = array("image/jpg", "image/JPG", "image/jpeg", "image/bmp", "image/gif", "image/png");
if (in_array($file['type'], $valid_types))
return 1;
return 0;
}
但是我被告知最好自己检查文件类型,我将如何使用 getimagesize() 以类似的方式检查文件类型?