问题：

最近用tp6的文件上传方法上传文件时报文件过大错误。如下所示：

 $file = $this->request->file('file');

{"code": 1,"msg": "上传文件大小超过了最大值！","data": {"code": 1,"line": 1232,"file": "D:\\myweb\\ytems\\vendor\\topthink\\framework\\src\\think\\Request.php","message": "上传文件大小超过了最大值！"}
}

解决：

1、php.ini 配置

修改 upload_max_filesize = 10M 值为合适的大小

;;;;;;;;;;;;;;;;
; File Uploads ;
;;;;;;;;;;;;;;;;; Whether to allow HTTP file uploads.
; http://php.net/file-uploads
file_uploads = On; Temporary directory for HTTP uploaded files (will use system default if not
; specified).
; http://php.net/upload-tmp-dir
;upload_tmp_dir =; Maximum allowed size for uploaded files.
; http://php.net/upload-max-filesize
upload_max_filesize = 10M; Maximum number of files that can be uploaded via a single request
max_file_uploads = 20

2、 确认TP6框架的文件上传限制配置

TP6框架本身对文件上传有一定的限制，这个限制可以在配置文件中进行设置。你需要检查并修改以下配置文件：

• ‌config/filesystem.php‌：这个文件通常包含了文件上传的相关配置。你可以找到类似max_filesize的配置项，并将其设置为一个更大的值。例如：

  return [// ...'disks' => ['public' => [// ...'max_filesize' => '20M', // 设置为你需要的最大值],// ...],// ...
  ];
  

3、构建验证文件上传大小和格式的函数 

调用函数：

$file = $this->request->file('file');
//校验图片 
$checkFile = checkUploadFile($file, 2, ['jpg','jpeg','png']);
if($checkFile['code'] != 200){return error($checkFile['msg']);
}

/*** 判断上传文件是否合法   如：php文件不可上传** @author* @param $file* @param $only_php_check  是否仅检查非php文件* @param $allowed_types  允许的文件类型* @param $allowed_extensions  允许的文件扩展名* @param $from_allowed_size  允许的文件大小 单位 M* @return  array*/
function checkUploadFile($file,  $from_allowed_size=2, $allowed_extensions=[], $only_php_check=false) {$allowed_size = $from_allowed_size * 1024 * 1024;if (!isset($file)) {return false;}$check_php = true;//允许的文件类型(mimeType): application/vnd.ms-excel//不允许的类型 text/x-php$mime_type = strtolower($file->getMime());//text/x-php$extension = strtolower($file->getOriginalExtension());//php$file_size = $file->getSize();if($mime_type == 'text/x-php' || $extension == 'php'){$check_php = false;//上传文件为php文件}if($only_php_check){//仅判断是否为php文件的话 此时就返回结果。终止后续判断了。if($check_php){return ['code'=>200, 'msg'=>'上传成功'];}else{return ['code'=>4003, 'msg'=>'非法上传文件'];//为 php文件}}// 允许的MIME类型数组和扩展名数组if(!$allowed_extensions){$allowed_extensions = ['jpg', 'jpeg', 'png', 'gif', 'xls'];$allowed_types = ['image/jpeg', 'image/png', 'image/gif', 'application/vnd.ms-excel'];}else{$allowed_types = [];foreach ($allowed_extensions as $k=>&$v) {switch($v){case 'jpg':case 'jpeg':$allowed_types[$k] = 'image/jpeg';break;case 'png':$allowed_types[$k] = 'image/png';break;case 'gif':$allowed_types[$k] = 'image/gif';break;case 'xls':$allowed_types[$k] = 'application/vnd.ms-excel';break;default:$allowed_types[$k] = $v;break;}}}if($file_size > $allowed_size){return ['code'=>4002, 'msg'=>'上传文件尺寸不可大于'.$from_allowed_size.'M'];}// 检查MIME类型和扩展名是否都在允许的列表中if (in_array($mime_type, $allowed_types) && in_array($extension, $allowed_extensions)) {return ['code'=>200, 'msg'=>'上传成功'];} else {return ['code'=>4001, 'msg'=>'上传图片格式不正确'];}}