本文实例为大家分享了php上传类，供大家参考，具体内容如下

<?phpclass UploadFile{ var $inputName; //控件名 var $allowType = array( 'image/gif','image/jpg','image/jpeg','image/png','image/x-png','image/pjpeg' ); //上传类型 var $allowSize = 2097152; //限制大小 var $saveDir = UPLOAD; //保存目录 var $isRename = true; //是否重命名，默认为true var $errID = 0; //错误代码，默认为0 var $errMsg = ""; //错误信息 var $savePath = ""; //保存路径 function __construct($inputName,$allowType="",$allowSize="",$saveDir="",$isRename=true){ if(empty($inputName)){ $this->chk_err(-1); //无传入控件名 }else{ $this->inputName = $inputName; } if(!empty($allowType)) $this->allowType = $allowType; if(!empty($allowSize)) $this->allowSize = $allowSize; if(!empty($saveDir)) $this->saveDir = $saveDir; if(!empty($isRename)) $this->isRename = $isRename; } function is_uploaded(){ if(empty($_FILES[$this->inputName]['name'])){ $this->chk_err(4); //没有文件被上传 }else{ if(is_uploaded_file($_FILES[$this->inputName]['tmp_name'])){ return true; }else{ $this->chk_err(-2); //文件上传不合法 } } } function chk_type(){ if(!in_array($_FILES[$this->inputName]['type'],$this->allowType)){ $this->chk_err(-3); //上传的文件类型不被允许 }else{ return true; } } function chk_size(){ if($_FILES[$this->inputName]['size'] > $this->allowSize){ $this->chk_(-4); //上传的文件过大 }else{ return true; } } function move_uploaded(){ //移动上传文件 if(!$this->is_uploaded()){ return false; } if(!$this->chk_size()){ return false; } if(!$this->chk_type()){ return false; } //重命名 if($this->isRename){ $arrTmp = pathinfo($_FILES[$this->inputName]['name']); $extension = strtolower($arrTmp['extension']); $file_newname = date("YmdHis").rand(1000,9999)."00.".$extension; //重命名新文件， 00表示为上传的为原图 }else{ $file_newname = $_FILES[$this->inputName]['name']; } if(!file_exists($this->saveDir)){ //判断保存目录是否存在 mkdir($this->saveDir,0777,true); //建立保存目录 } //移动文件 $result = move_uploaded_file($_FILES[$this->inputName]['tmp_name'],$this->saveDir."/".$file_newname); if($result){ $path = $this->savePath = $this->saveDir.$file_newname; //文件的成功保存路径 return $path; }else{ $this->chk_err($_FILES[$this->inputName]['error']); } } //判断出错信息 function chk_err($errID){ $this->errID = $errID; switch($this->errID){ case -4: $this->errMsg = "上传的文件过大"; break; case -3: $this->errMsg = "上传的文件类型不被允许"; break; case -2: $this->errMsg = "文件上传不合法"; break; case -1: $this->errMsg = "无控件名传入"; break; case 1: $this->errMsg = '上传的文件超出了php.ini中upload_max_filesize设定的最大值'; break; case 2: $this->errMsg = '上传文件的大小超过了HTML表单中MAX_FILE_SIZE选项指定的值'; break; case 3: $this->errMsg = '文件只有部分被上传'; break; case 4: $this->errMsg = '没有文件被上传'; break; default: break; } return false; } function get_errMsg(){ echo $this->errMsg; //输出错误信息 } /** +---------------------------------------------------------- * 取得图像信息 * +---------------------------------------------------------- * @static * @access public +---------------------------------------------------------- * @param string $image 图像文件名 +---------------------------------------------------------- * @return mixed +---------------------------------------------------------- */ function getImageInfo($img) { $imageInfo = getimagesize($img); if( $imageInfo!== false) { $imageType = strtolower(substr(image_type_to_extension($imageInfo[2]),1)); $imageSize = filesize($img); $info = array( "width" =>$imageInfo[0], "height" =>$imageInfo[1], "type" =>$imageType, "size" =>$imageSize, "mime" =>$imageInfo['mime'], ); return $info; }else { return false; } } /** +---------------------------------------------------------- * 生成缩略图 +---------------------------------------------------------- * @static * @access public +---------------------------------------------------------- * @param string $image 原图 * @param string $type 图像格式 * @param string $thumbname 缩略图文件名 * @param string $maxWidth 宽度 * @param string $maxHeight 高度 * @param string $position 缩略图保存目录 * @param boolean $interlace 启用隔行扫描 * @param boolean $is_save 是否保留原图 +---------------------------------------------------------- * @return void +---------------------------------------------------------- */ function thumb($image,$is_save=true,$suofang=0,$type='',$maxWidth=500,$maxHeight=500,$interlace=true){ // 获取原图信息 $info = $this->getImageInfo($image); if($info !== false) { $srcWidth = $info['width']; $srcHeight = $info['height']; $type = empty($type)?$info['type']:$type; $type = strtolower($type); $interlace = $interlace? 1:0; unset($info); if ($suofang==1) { $width = $srcWidth; $height = $srcHeight; } else { $scale = min($maxWidth/$srcWidth, $maxHeight/$srcHeight); // 计算缩放比例 if($scale>=1) { // 超过原图大小不再缩略 $width = $srcWidth; $height = $srcHeight; }else{ // 缩略图尺寸 $width = (int)($srcWidth*$scale); //147 $height = (int)($srcHeight*$scale); //199 } } // 载入原图 $createFun = 'ImageCreateFrom'.($type=='jpg'?'jpeg':$type); $srcImg = $createFun($image); //创建缩略图 if($type!='gif' && function_exists('imagecreatetruecolor')) $thumbImg = imagecreatetruecolor($width, $height); else $thumbImg = imagecreate($width, $height); // 复制图片 if(function_exists("ImageCopyResampled")) imagecopyresampled($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth,$srcHeight); else imagecopyresized($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth,$srcHeight); if('gif'==$type || 'png'==$type) { //imagealphablending($thumbImg, false);//取消默认的混色模式 //imagesavealpha($thumbImg,true);//设定保存完整的 alpha 通道信息 $background_color = imagecolorallocate($thumbImg, 0,255,0); // 指派一个绿色 imagecolortransparent($thumbImg,$background_color); // 设置为透明色，若注释掉该行则输出绿色的图 } // 对jpeg图形设置隔行扫描 if('jpg'==$type || 'jpeg'==$type) imageinterlace($thumbImg,$interlace); //$gray=ImageColorAllocate($thumbImg,255,0,0); //ImageString($thumbImg,2,5,5,"ThinkPHP",$gray); // 生成图片 $imageFun = 'image'.($type=='jpg'?'jpeg':$type); $length = strlen("00.".$type) * (-1); $_type = substr($image,-4); $length = ($type != $_type ? $length+1 : $length); //裁剪 if ($suofang==1) { $thumbname01 = substr_replace($image,"01.".$type,$length); //大头像 $thumbname02 = substr_replace($image,"02.".$type,$length); //小头像 $imageFun($thumbImg,$thumbname01,100); $imageFun($thumbImg,$thumbname02,100); $thumbImg01 = imagecreatetruecolor(190,195); imagecopyresampled($thumbImg01,$thumbImg,0,0,$_POST['x'],$_POST['y'],190,195,$_POST['w'],$_POST['h']); $thumbImg02 = imagecreatetruecolor(48,48); imagecopyresampled($thumbImg02,$thumbImg,0,0,$_POST['x'],$_POST['y'],48,48,$_POST['w'],$_POST['h']); $imageFun($thumbImg01,$thumbname01,100); $imageFun($thumbImg02,$thumbname02,100);// unlink($image); imagedestroy($thumbImg01); imagedestroy($thumbImg02); imagedestroy($thumbImg); imagedestroy($srcImg); return array('big' => $thumbname01 , 'small' => $thumbname02); //返回包含大小头像路径的数组 }else{ if($is_save == false){ //缩略图覆盖原图，缩略图的路径还是原图路径 $imageFun($thumbImg,$image,100); }else{ $thumbname03 = substr_replace($image,"03.".$type,$length); //缩略图与原图同时存在， $imageFun($thumbImg,$thumbname03,100); imagedestroy($thumbImg); imagedestroy($srcImg); return $thumbname03 ; //返回缩略图的路径，字符串 } } } return false; }}

以上就是本文的全部内容，希望对大家学习php程序设计有所帮助。