if ($request->hasFile('banner_img') && $request->file('banner_img')->isValid()) {//判断文件是否存在
$file = $request->file('banner_img');
$ext = $file->extension();
$filesize = $_FILES['banner_img']['size'];
$filename = md5(time().rand(100000,999999)).'.'.$ext;
$store_result = $request->file('banner_img')->move('./upload',$filename);//上传文件
if(!in_array(strtoupper($ext),['JPG','JPEG','PNG','GIF'])){
return [
'code'=> 100000,
'msg'=> '图片格式不正确'.strtoupper($ext),
'data'=>null
];
}
if(!$filesize || $filesize>1048576 * 20){
return [
'code'=> 100000,
'msg'=> '检测到文件大小为0或文件大小超过20M',
'data'=>null
];
}
return response()->json([
'code' => 0,
'msg' => 'ok',
'data'=>'./upload'.$filename
]);
}
if ($request->hasFile('banner_img') && $request->file('banner_img')->isValid()) {//判断文件是否存在
$log = $request->file('banner_img');
$arr = explode('.', $_FILES['banner_img']['name']);
$ext = $arr[count($arr) - 1];
$filename = md5(time().rand(100000,999999)).'.'.$ext;
$filesize = $_FILES['banner_img']['size'];
if(!in_array(strtoupper($ext),['JPG','JPEG','PNG','GIF'])){
return [
'code'=> 100000,
'msg'=> '图片格式不正确'.strtoupper($ext),
'data'=>null
];
}
if(!$filesize || $filesize>1048576 * 20){
return [
'code'=> 100000,
'msg'=> '检测到文件大小为0或文件大小超过20M',
'data'=>null
];
}
$store_result = $log->storeAs('banner',$filename,'banner_public');
$output = [
// 'extension' => $extension,
'store_result' => $store_result
];
return [
'code'=> 0,
'msg'=> 'ok',
'data'=>$store_result
];
}
来源：https://www.cnblogs.com/zhanghuilong/p/11715850.html