PHP文件上传小程序 适合初学者学习!_php实例_

文件： 

upload_file(); } class Upload{ public $upload_name; //上传文件名 public $upload_tmp_name; //上传临时文件名 public $upload_final_name; //上传文件的最终文件名 public $upload_target_dir; //文件被上传到的目标目录 public $upload_target_path; //文件被上传到的最终路径 public $upload_filetype ; //上传文件类型 public $allow_uploadedfile_type;//允许的上传文件类型 public $upload_file_size; //上传文件的大小 public $allow_uploaded_maxsize=10000000;//允许上传文件的最大值 //构造函数 public function __construct() { $this->upload_name = $_FILES["file"]["name"]; //取得上传文件名 $this->upload_filetype = $_FILES["file"]["type"]; $this->upload_tmp_name = $_FILES["file"]["tmp_name"]; $this->allow_uploadedfile_type = array('jpeg','jpg','png','gif','bmp','doc','xls','csv','zip','rar','txt','wps'); $this->upload_file_size = $_FILES["file"]["size"]; $this->upload_target_dir="./upload"; } //文件上传 public function upload_file() { $upload_filetype = $this->getFileExt($this->upload_name);//获取文件扩展名 if(in_array($upload_filetype,$this->allow_uploadedfile_type))//判断文件类型是否符合要求 { if($this->upload_file_size < $this->allow_uploaded_maxsize)//判断文件大小是否超过允许的最大值 { if(!is_dir($this->upload_target_dir))//如果文件上传目录不存在 { mkdir($this->upload_target_dir);//创建文件上传目录 chmod($this->upload_target_dir,0777);//改权限 } $this->upload_final_name = date("YmdHis").rand(0,100).'.'.$upload_filetype;//生成随机文件名 $this->upload_target_path = $this->upload_target_dir."/".$this->upload_final_name;//文件上传目标目录 if(!move_uploaded_file($this->upload_tmp_name,$this->upload_target_path))//文件移动失败 { echo "文件上传失败！"; } else { echo "文件上传成功！"; } } else { echo("文件太大,上传失败！"); } } else { echo("仅支持一下文件类型，请重新选择：
".implode('，',$this->allow_uploadedfile_type).""); } } /** *获取文件扩展名 *@param String $filename 要获取文件名的文件 */ public function getFileExt($filename){ $info = pathinfo($filename); return @$info["extension"]; } } ?>