该文章详细整理了laravel常用上传文件信息获取的方法，记录一下，可以拿来就用！！！
1、获取上传的文件
//use Illuminate\Http\Request;
$file=$request->file('file');2、获取上传文件的文件名（带后缀，如 abc.png）
$filename=$file->getClientOriginalName();3、获取上传文件的后缀（如 abc.png，获取到的为 png）
$fileextension=$file->getClientOriginalExtension();4、获取上传文件的大小
$filesize=$file->getClientSize();6、获取文件的mime类型
$mimeTye = file -> getMimeType(); 常用mime类型
$mime_types = array(
'gif' => 'image/gif',
'jpg' => 'image/jpeg',
'jpeg' => 'image/jpeg',
'jpe' => 'image/jpeg',
'bmp' => 'image/bmp',
'png' => 'image/png',
'tif' => 'image/tiff',
'tiff' => 'image/tiff',
'pict' => 'image/x-pict',
'pic' => 'image/x-pict',
'pct' => 'image/x-pict',
'tif' => 'image/tiff',
'tiff' => 'image/tiff',
'psd' => 'image/x-photoshop',
'swf' => 'application/x-shockwave-flash',
'js' => 'application/x-javascript',
'pdf' => 'application/pdf',
'ps' => 'application/postscript',
'eps' => 'application/postscript',
'ai' => 'application/postscript',
'wmf' => 'application/x-msmetafile',
'css' => 'text/css',
'htm' => 'text/html',
'html' => 'text/html',
'txt' => 'text/plain',
'xml' => 'text/xml',
'wml' => 'text/wml',
'wbmp' => 'image/vnd.wap.wbmp',
'mid' => 'audio/midi',
'wav' => 'audio/wav',
'mp3' => 'audio/mpeg',
'mp2' => 'audio/mpeg',
'avi' => 'video/x-msvideo',
'mpeg' => 'video/mpeg',
'mpg' => 'video/mpeg',
'qt' => 'video/quicktime',
'mov' => 'video/quicktime',
'lha' => 'application/x-lha',
'lzh' => 'application/x-lha',
'z' => 'application/x-compress',
'gtar' => 'application/x-gtar',
'gz' => 'application/x-gzip',
'gzip' => 'application/x-gzip',
'tgz' => 'application/x-gzip',
'tar' => 'application/x-tar',
'bz2' => 'application/bzip2',
'zip' => 'application/zip',
'arj' => 'application/x-arj',
'rar' => 'application/x-rar-compressed',
'hqx' => 'application/mac-binhex40',
'sit' => 'application/x-stuffit',
'bin' => 'application/x-macbinary',
'uu' => 'text/x-uuencode',
'uue' => 'text/x-uuencode',
'latex'=> 'application/x-latex',
'ltx' => 'application/x-latex',
'tcl' => 'application/x-tcl',
'pgp' => 'application/pgp',
'asc' => 'application/pgp',
'exe' => 'application/x-msdownload',
'doc' => 'application/msword',
'rtf' => 'application/rtf',
'xls' => 'application/vnd.ms-excel',
'ppt' => 'application/vnd.ms-powerpoint',
'mdb' => 'application/x-msaccess',
'wri' => 'application/x-mswrite',
);7、获取缓存在 tmp 目录下的文件名（带后缀，如 php8933.tmp）
$filaname=$file->getFilename();8、获取上传的文件缓存在 tmp 文件夹下的绝对路径
$realpath=$file->getRealPath();9、将缓存在 tmp 目录下的文件移到某个位置，返回的是这个文件移动过后的路径
$path =base_path()."/uploads";
$newName = date('YmdHis').mt_rand(100,999).".".$extension;
$path=$file->move($path,$newName);move () 方法有两个参数， $path 参数是文件移到哪个文件夹下的路径， $newName 参数是将上传的文件重新命名的文件名
10、检测上传的文件是否合法，返回值为 true 或 false
$file->isValid();
