$index = strrpos($_FILES["upload_file"]['name'], '.');
获取文件名
$prefix = substr($_FILES["upload_file"]['name'], 0, $index);
获取文件后缀
$suffix = substr($_FILES["upload_file"]['name'], $index);
$index = strrpos($_FILES["upload_file"]['name'], '.');
获取文件名
$prefix = substr($_FILES["upload_file"]['name'], 0, $index);
获取文件后缀
$suffix = substr($_FILES["upload_file"]['name'], $index);