1 class FileUpload {  2  /**  3    * 文件上传类  4    * @author lhm  5    * for example  6    * $up=new FileUpload(array('israndname'=>true,  7    *                           'allowType'=>array('txt', 'doc', 'php', 'gif','jpg'),  8    *                           'filepath'=>'./uploads/',   9    *                           'maxSize'=>2000000)); 10    * $up->uploadFile('pic');//pic 为文件输入框name值 11    */ 12     private $filepath;     //指定上传文件保存的路径 13     private $allowtype=array('gif', 'jpg', 'png', 'jpeg');  //充许上传文件的类型 14     private $maxsize=2000000;  //允上传文件的最大长度 2M 15     private $israndname=true;  //是否随机重命名， true false不随机，使用原文件名 16     private $originName;   //源文件名称 17     private $tmpFileName;   //临时文件名 18     private $fileType;  //文件类型 19     private $fileSize;  //文件大小 20     private $newFileName; //新文件名 21     private $errorNum=0;  //错误号 22     private $errorMess=''; //用来提供错误报告 23  24      25     /** 26      * 用于上传文件初始化 27      * 用户可以不用按位置传参数，后面参数给值不用将前几个参数也提供值 28      */ 29     function __construct($options = array()){ 30         $allowOption = array('filepath','allowtype','maxsize','israndname'); 31         foreach($options as $key=>$val){ 32             $key = strtolower($key); 33             //查看用户参数中数组的下标是否和成员属性名相同 34             //if(!in_array($key,get_class_vars(get_class($this)))){
     35             if(!in_array($key, $allowOption)){ 36                 $this->setOption('errorNum', 5); 37                 $this->errorMess = $this->getError(); 38                 continue 1; 39             } 40             $this->setOption($key, $val); 41         } 42     } 43      44     /** 45      *  46      * 用来检查文件上传路径 47      * @access private 48      * @return bool 49      */ 50     private function checkFilePath(){ 51         if(empty($this->filepath)) { 52             $this->setOption('errorNum', -5); 53             return false; 54         } 55  56         if(!file_exists($this->filepath) || !is_writable($this->filepath)){ 57             if(!@mkdir($this->filepath, 0755)){ 58                 $this->setOption('errorNum', -4); 59                 return false; 60             } 61         } 62         return true; 63     } 64     /** 65      *  66      * 用来检查文件上传的大小 67      * @access private 68      * @return bool 69      */ 70     private function checkFileSize() { 71         if($this->fileSize > $this->maxsize){ 72             $this->setOPtion('errorNum', -2); 73             return false; 74         }else{ 75             return true; 76         } 77     } 78     /** 79      *  80      * 用于检查文件上传类型 81      * @access private 82      * @return bool 83      */ 84     private function checkFileType() { 85         if(in_array(strtolower($this->fileType), $this->allowtype)) { 86             return true; 87         }else{ 88             $this->setOption('errorNum', -1); 89             return false; 90         } 91     } 92     /** 93      *  94      * 检查文件真实上传数量，如果文件名为空，则删除对应元素值 95      * @access private 96      * @param array $name 97      * @param array $tmpName 98      * @param array $size 99      * @param array $error100      * @param array $fileField101      */102     private function checkFileNum($name, $tmpName, $size, $error, $fileField){103         $continue = true;104         for($i=0; $i < count($name); $i++){105             if ($name[$i] === ''){106                 $name = $this->deleteArrayElement($name, $i);//线性删除107                 $tmpName = $this->deleteArrayElement($tmpName, $i);108                 $size = $this->deleteArrayElement($size, $i);109                 $error = $this->deleteArrayElement($error, $i);110                 $continue = false;111                 break 1;112             }113         }114         if ($continue === false){115             $this->checkFileNum($name, $tmpName, $size, $error, $fileField);//递归116         }else {117             //将空空元素删除后重新赋给$_FILES118             $_FILES[$fileField]['name'] = $name;119             $_FILES[$fileField]['tmp_name'] = $tmpName;120             $_FILES[$fileField]['size'] = $size;121             $_FILES[$fileField]['error'] = $error;122         }123         124     }125     /**126      * 127      * 设置上传后的文件名称128      * @access private129      */130     private function setNewFileName(){131         if($this->israndname){132             $this->setOption('newFileName', $this->setRandName());//系统随机名133         } else {134             $this->setOption('newFileName', $this->originName);//沿用文件旧名135         }136     }137     /**138      * 139      * 设置随机文件名称140      * @access private141      * @return string142      */143     private function setRandName(){144         $fileName = date("YmdHis").rand(100,999);145         return $fileName.'.'.$this->fileType;146     }147     /**148      * 149      * 自动生成属性并赋值150      * @param string $key151      * @param string $val152      */153     private function setOption($key, $val){154         $this->$key=$val;155     }156     /**157      * 158      * 用于上传文件159      * @param string $fileField160      */161     public function uploadFile($fileField){162         $return=true;163         //检查初始化是否出错164         if ($this->errorNum != 0){165             $this->errorMess = $this->getError();166             return false;167         }168         //检查文件上传路径169         if(!$this->checkFilePath()){170             $this->errorMess = $this->getError();171             return false;172         }173 174         $this->checkFileNum($_FILES[$fileField]['name'],$_FILES[$fileField]['tmp_name'],175                             $_FILES[$fileField]['size'],$_FILES[$fileField]['error'],176                             $fileField);177         $name = $_FILES[$fileField]['name'];178         $tmpName = $_FILES[$fileField]['tmp_name'];179         $size = $_FILES[$fileField]['size'];180         $error = $_FILES[$fileField]['error'];181         //print_r($name);182         if(is_Array($name)){183             $errors = array();184             $count = count($name);185             for($i=0; $i < $count; $i++){186                 if($this->setFiles($name[$i], $tmpName[$i], $size[$i], $error[$i])){187                     if(!$this->checkFileSize() || !$this->checkFileType()){188                         $errors[] = $this->getError();189                         $return=false;190                     }191                 }else{192                     $error[] = $this->getError();193                     $return = false;194                 }195 196                 if(!$return)197                     $this->setFiles();198             }199 200             if($return){201                 $fileNames = array();202                 for($i = 0; $i < $count; $i++){203                     if($this->setFiles($name[$i], $tmpName[$i], $size[$i], $error[$i])){204                         $this->setNewFileName();205                         if(!$this->copyFile()){206                             $errors = $this->getError();207                             $return = false;208                         }else{209                             $fileNames[] = $this->newFileName;210                         }211                     }212                 }213 214                 $this->newFileName = $fileNames;215             }216             $this->errorMess = $errors;217         }else{218             if($this->setFiles($name, $tmpName, $size, $error)){219                 if($this->checkFileSize() && $this->checkFileType()){220                     $this->setNewFileName();221 222                     if($this->copyFile()){223                         return true;224                     }else{225                         $return = false;226                     }227                         228                 }else{229                     $return = false;230                 }    231             }else{232                 $return = false;233             }234 235             if(!$return)236                 $this->errorMess = $this->getError();    237         }    238         return $return;        239     }240     /**241      * 242      * 将临时文件移动到正式路径243      * @access private244      * @return bool245      */246     private function copyFile(){247         if(!$this->errorNum){248             $filepath = rtrim($this->filepath, '/').'/';249             $filepath .= $this->newFileName;250 251             if(@move_uploaded_file($this->tmpFileName, $filepath))    {252                 return true;253             }else{254                 $this->setOption('errorNum', -3);255                 return false;256             }257                 258         }else{259             return false;260         }261     }262     /**263      * 设置文件属性的值264      */265     private function setFiles($name = '', $tmpName = '', $size = 0, $error = 0){266     267         $this->setOption('errorNum', $error);268             269         if($error){270             return false;271         }272 273         $this->setOption('originName', $name);274         $this->setOption('tmpFileName', $tmpName);275         $arrStr=explode('.', $name); 276         $this->setOption('fileType', strtolower($arrStr[count($arrStr)-1]));277         $this->setOption('fileSize', $size);    278 279         return true;280     }281     /**282      * 283      * 线性删除284      * @access private285      * @param array $array286      * @param int $i287      * @return array;288      */    289     private function deleteArrayElement($array , $i) { 290         $count = count($array);  291         for ($j = $i; $j < $count; $j ++){ 292                 $array[$j] = $array [$j+1]; 293         } 294         array_pop ($array); 295         return $array ; 296     }297     /**298      * 299      * 用于获取上传后文件的文件名300      * @access public301      * @return string302      */303     public function getNewFileName(){304         return $this->newFileName;305     }306     /**307      * 308      * 获取上传错误信息309      * @access private310      * @return string311      */312     private function getError(){313         $str='上传文件'.$this->originName.'时出错：';314 315         switch($this->errorNum){316             case 5: $str .= '初始化参数出错';317                 break;318             case 4: $str .= '没有文件被上传'; 319                 break;320             case 3: $str .= '文件只被部分上传'; 321                 break;322             case 2: $str .= '上传文件超过了HTML表单中MAX_FILE_SIZE选项指定的值';323                 break;324             case 1: $str .= '上传文件超过了php.ini 中upload_max_filesize选项的值';325                 break;326             case -1: $str .= '末充许的类型';327                 break;328             case -2: $str .= '文件过大，上传文件不能超过'.$this->maxSize.'个字节';329                 break;330             case -3: $str .= '上传失败';331                 break;332             case -4: $str .= '建立存放上传文件目录失败，请重新指定上传目录';333                 break;334             case -5: $str .= '必须指定上传文件的路径';335                 break;336             default: $str .= '末知错误';337         }338 339         return $str.'
';340     }341     /**342      * 343      * 查看错误报告344      * @access public345      * @return string346      */347     public function getErrorMsg() {348         return $this->errorMess;349     }350 }