文件上传与下载学习笔记（3）---面向对象方法实现文件上传
代码：
1 <?php 2 class uploadClass { 3 protected $filename; 4 protected $maxSize; 5 protected $allowExt; 6 protected $allowMime; 7 protected $uploadPath; 8 protected $imgFlag; 9 protected $fileInfo; 10 protected $error; 11 protected $ext; 12 protected $uniName; 13 protected $dst; 14 //构造函数初始化 15 public function __construct($fileName = "myFile", $uploadPath = "oop", $maxSize = 5242880, $allowExt = array("jpeg","jpg","png","gif"), $allowMime = array("image/jpeg","image/jpg","image/png","image/gif"), $imgFlag = false) { 16 $this->fileName = $fileName; 17 $this->fileInfo = $_FILES [$this->fileName]; 18 $this->maxSize = $maxSize; 19 $this->allowMime = $allowMime; 20 $this->ext = pathinfo ( $this->fileInfo ['name'], PATHINFO_EXTENSION ); 21 $this->allowExt = $allowExt; 22 $this->uploadPath = $uploadPath; 23 $this->imgFlag = $imgFlag; 24 $this->uniName=md5(uniqid(microtime(true),true)); 25 $this->dst=$this->uploadPath.'/'.$this->uniName.'.'.$this->ext; 26 } 27 /** 28 * 检测上传是否有错 29 * 30 * @return boolean 31 */ 32 protected function checkError() { 33 if ($this->fileInfo ['error'] == 0) { 34 return true; 35 } else { 36 switch ($this->fileInfo ['error']) { 37 case 1 : 38 $this->error = $fileInfo ['name'] . '上传文件超过了upload_max_filesize 选项的值'; 39 break; 40 case 2 : 41 $this->error = $fileInfo ['name'] . '超过了表单MAX_FILE_SIZE限制的大小'; 42 break; 43 case 3 : 44 $this->error = $fileInfo ['name'] . '文件上传不完整'; 45 break; 46 case 4 : 47 $this->error = $fileInfo ['name'] . '没有选择上传文件'; 48 break; 49 case 6 : 50 $this->error = $fileInfo ['name'] . '没有找到临时目录'; 51 break; 52 case 7 : 53 $this->error = $fileInfo ['name'] . '文件写入失败'; 54 break; 55 case 8 : 56 $this->error = $fileInfo ['name'] . '文件上传被php扩展程序中断'; 57 break; 58 } 59 return false; 60 } 61 } 62 /** 63 * 检查文件大小 64 * 65 * @return boolean 66 */ 67 protected function checkSize() { 68 if ($this->fileInfo ['size'] > $this->maxSize) { 69 $this->error = "上传文件过大"; 70 return false; 71 } else { 72 return true; 73 } 74 } 75 /** 76 * 检查文件类型 77 * 78 * @return boolean 79 */ 80 protected function checkExt() { 81 if (! in_array ( $this->ext, $this->allowExt )) { 82 $this->error = "不正确的文件"; 83 return false; 84 } else { 85 return true; 86 } 87 } 88 /** 89 * 检测文件的Mime类型 90 * 91 * @return boolean 92 */ 93 protected function checkMime() { 94 if (! in_array ( $this->fileInfo ['type'], $this->allowMime )) { 95 $this->error = "文件类型不正确"; 96 return false; 97 } else { 98 return true; 99 } 100 } 101 /** 102 * 检测是否是真实图片 103 * 104 * @return boolean 105 */ 106 protected function checkTureImg() { 107 if ($this->imgFlag) { 108 if (@! getimagesize ( $this->fileInfo ['tmp_name'] )) { 109 $this->error = "不是真正的图片"; 110 return false; 111 } else { 112 return true; 113 } 114 }else{ 115 return true; 116 } 117 } 118 /** 119 * 检测是否通过HTTP POST 上传 120 * @return boolean 121 */ 122 protected function checkPost() { 123 if (!is_uploaded_file ( $this->fileInfo ['tmp_name'] )) { 124 $this->error = "不是通过 HTTP POST 方式上传"; 125 return false; 126 } else { 127 return true; 128 } 129 } 130 /** 131 * 显示错误信息 132 */ 133 protected function showError(){ 134 exit("<span color='red'>".$this->error."</span>"); 135 } 136 /** 137 * 检测文件夹是否存在，不存在则创建 138 */ 139 protected function checkPath(){ 140 if(!file_exists($this->uploadPath)){ 141 mkdir($this->uploadPath,0777,true); 142 } 143 } 144 /** 145 * 文件上传公共接口 146 */ 147 public function uploadfile() { 148 if ($this->checkError () && $this->checkSize () && $this->checkExt () && $this->checkMime () && $this->checkPost () && $this->checkTureImg()) { 149 $this->checkPath(); 150 if(move_uploaded_file($this->fileInfo['tmp_name'], $this->dst)){ 151 return $this->dst; 152 }else{ 153 $this->error="文件移动失败"; 154 $this->showError(); 155 } 156 } else { 157 $this->showError (); 158 } 159 } 160 }
