-
-
//-------------------------------------
- // 文件说明：文件上传处理类
- // 文件作者：Jesse Lee
- //-------------------------------------
- class upload {
- var $dir; //附件存放物理目录
- var $time; //自定义文件上传时间
- var $allow_types; //允许上传附件类型
- var $field; //上传控件名称
- var $maxsize; //最大允许文件大小，单位为KB
- var $thumb_width; //缩略图宽度
- var $thumb_height; //缩略图高度
- var $watermark_file; //水印图片地址
- var $watermark_pos; //水印位置
- var $watermark_trans;//水印透明度
- //构造函数
- //$types : 允许上传的文件类型 , $maxsize : 允许大小 , $field : 上传控件名称 , $time : 自定义上传时间
- function upload($types = 'jpg|png', $maxsize = 1024, $field = 'attach', $time = '') {
- $this->allow_types = explode('|',$types);
- $this->maxsize = $maxsize * 1024;
- $this->field = $field;
- $this->time = $time ? $time : time();
- }
- //设置并创建文件具体存放的目录
- //$basedir : 基目录，必须为物理路径
- //$filedir : 自定义子目录，可用参数{y}、{m}、{d}
- function set_dir($basedir,$filedir = '') {
- $dir = $basedir;
- !is_dir($dir) && @mkdir($dir,0777);
- if (!empty($filedir)) {
- $filedir = str_replace(array('{y}','{m}','{y}'),array(date('Y',$this->time),date('m',$this->time),date('d',$this->time)),strtolower($filedir));
- $dirs = explode('/',$filedir);
- foreach ($dirs as $d) {
- !empty($d) && $dir .= $d.'/';
- !is_dir($dir) && @mkdir($dir,0777);
- }
- }
- $this->dir = $dir;
- }
- //图片缩略图设置，如果不生成缩略图则不用设置
- //$width : 缩略图宽度 , $height : 缩略图高度
- function set_thumb ($width = 0, $height = 0) {
- $this->thumb_width = $width;
- $this->thumb_height = $height;
- }
- //图片水印设置，如果不生成添加水印则不用设置
- //$file : 水印图片 , $pos : 水印位置 , $trans : 水印透明度
- function set_watermark ($file, $pos = 6, $trans = 80) {
- $this->watermark_file = $file;
- $this->watermark_pos = $pos;
- $this->watermark_trans = $trans;
- }
- /*----------------------------------------------------------------
- 执行文件上传，处理完返回一个包含上传成功或失败的文件信息数组，
- 其中：name 为文件名，上传成功时是上传到服务器上的文件名，上传失败则是本地的文件名
- dir 为服务器上存放该附件的物理路径，上传失败不存在该值
- size 为附件大小，上传失败不存在该值
- flag 为状态标识，1表示成功，-1表示文件类型不允许，-2表示文件大小超出
- ----------------------------------------------------------------- */
- function execute() {
- $files = array(); //成功上传的文件信息
- $field = $this->field;
- $keys = array_keys($_FILES[$field]['name']);
- foreach ($keys as $key) {
- if (!$_FILES[$field]['name'][$key]) continue;
-
- $fileext = $this->fileext($_FILES[$field]['name'][$key]); //获取文件扩展名
- $filename = $this->time.mt_rand(100,999).'.'.$fileext; //生成文件名
- $filedir = $this->dir; //附件实际存放目录
- $filesize = $_FILES[$field]['size'][$key]; //文件大小
-
- //文件类型不允许
- if (!in_array($fileext,$this->allow_types)) {
- $files[$key]['name'] = $_FILES[$field]['name'][$key];
- $files[$key]['flag'] = -1;
- continue;
- }
- //文件大小超出
- if ($filesize > $this->maxsize) {
- $files[$key]['name'] = $_FILES[$field]['name'][$key];
- $files[$key]['flag'] = -2;
- continue;
- }
- $files[$key]['name'] = $filename;
- $files[$key]['dir'] = $filedir;
- $files[$key]['size'] = $filesize;
- //保存上传文件并删除临时文件
- if (is_uploaded_file($_FILES[$field]['tmp_name'][$key])) {
- move_uploaded_file($_FILES[$field]['tmp_name'][$key],$filedir.$filename);
- @unlink($_FILES[$field]['tmp_name'][$key]);
- $files[$key]['flag'] = 1;
- //对图片进行加水印和生成缩略图
- if (in_array($fileext,array('jpg','png','gif'))) {
- if ($this->thumb_width) {
- if ($this->create_thumb($filedir.$filename,$filedir.'thumb_'.$filename)) {
- $files[$key]['thumb'] = 'thumb_'.$filename; //缩略图文件名
- }
- }
- $this->create_watermark($filedir.$filename);
- }
- }
- }
- return $files;
- }
- //创建缩略图,以相同的扩展名生成缩略图
- //Php.aspx_file : 来源图像路径 , $thumb_file : 缩略图路径
- function create_thumb (Php.aspx_file,$thumb_file) {
- $t_width = $this->thumb_width;
- $t_height = $this->thumb_height;
- if (!file_exists(Php.aspx_file)) return false;
- Php.aspx_info = getImageSize(Php.aspx_file);
- //如果来源图像小于或等于缩略图则拷贝源图像作为缩略图
- if (Php.aspx_info[0] if (!copy(Php.aspx_file,$thumb_file)) {
- return false;
- }
- return true;
- }
- //按比例计算缩略图大小
- if (Php.aspx_info[0] - $t_width > Php.aspx_info[1] - $t_height) {
- $t_height = ($t_width / Php.aspx_info[0]) * Php.aspx_info[1];
- } else {
- $t_width = ($t_height / Php.aspx_info[1]) * Php.aspx_info[0];
- }
- //取得文件扩展名
- $fileext = $this->fileext(Php.aspx_file);
- switch ($fileext) {
- case 'jpg' :
- Php.aspx_img = ImageCreateFromJPEG(Php.aspx_file); break;
- case 'png' :
- Php.aspx_img = ImageCreateFromPNG(Php.aspx_file); break;
- case 'gif' :
- Php.aspx_img = ImageCreateFromGIF(Php.aspx_file); break;
- }
- //创建一个真彩色的缩略图像
- $thumb_img = @ImageCreateTrueColor($t_width,$t_height);
- //ImageCopyResampled函数拷贝的图像平滑度较好，优先考虑
- if (function_exists('imagecopyresampled')) {
- @ImageCopyResampled($thumb_img,Php.aspx_img,0,0,0,0,$t_width,$t_height,Php.aspx_info[0],Php.aspx_info[1]);
- } else {
- @ImageCopyResized($thumb_img,Php.aspx_img,0,0,0,0,$t_width,$t_height,Php.aspx_info[0],Php.aspx_info[1]);
- }
- //生成缩略图
- switch ($fileext) {
- case 'jpg' :
- ImageJPEG($thumb_img,$thumb_file); break;
- case 'gif' :
- ImageGIF($thumb_img,$thumb_file); break;
- case 'png' :
- ImagePNG($thumb_img,$thumb_file); break;
- }
- //销毁临时图像
- @ImageDestroy(Php.aspx_img);
- @ImageDestroy($thumb_img);
- return true;
- }
- //为图片添加水印
- //$file : 要添加水印的文件
- function create_watermark ($file) {
- //文件不存在则返回
- if (!file_exists($this->watermark_file) || !file_exists($file)) return;
- if (!function_exists('getImageSize')) return;
-
- //检查GD支持的文件类型
- $gd_allow_types = array();
- if (function_exists('ImageCreateFromGIF')) $gd_allow_types['image/gif'] = 'ImageCreateFromGIF';
- if (function_exists('ImageCreateFromPNG')) $gd_allow_types['image/png'] = 'ImageCreateFromPNG';
- if (function_exists('ImageCreateFromJPEG')) $gd_allow_types['image/jpeg'] = 'ImageCreateFromJPEG';
- //获取文件信息
- $fileinfo = getImageSize($file);
- $wminfo = getImageSize($this->watermark_file);
- if ($fileinfo[0] if (array_key_exists($fileinfo['mime'],$gd_allow_types)) {
- if (array_key_exists($wminfo['mime'],$gd_allow_types)) {
-
- //从文件创建图像
- $temp = $gd_allow_types[$fileinfo['mime']]($file);
- $temp_wm = $gd_allow_types[$wminfo['mime']]($this->watermark_file);
- //水印位置
- switch ($this->watermark_pos) {
- case 1 : //顶部居左
- $dst_x = 0; $dst_y = 0; break;
- case 2 : //顶部居中
- $dst_x = ($fileinfo[0] - $wminfo[0]) / 2; $dst_y = 0; break;
- case 3 : //顶部居右
- $dst_x = $fileinfo[0]; $dst_y = 0; break;
- case 4 : //底部居左
- $dst_x = 0; $dst_y = $fileinfo[1]; break;
- case 5 : //底部居中
- $dst_x = ($fileinfo[0] - $wminfo[0]) / 2; $dst_y = $fileinfo[1]; break;
- case 6 : //底部居右
- $dst_x = $fileinfo[0]-$wminfo[0]; $dst_y = $fileinfo[1]-$wminfo[1]; break;
- default : //随机
- $dst_x = mt_rand(0,$fileinfo[0]-$wminfo[0]); $dst_y = mt_rand(0,$fileinfo[1]-$wminfo[1]);
- }
- if (function_exists('ImageAlphaBlending')) ImageAlphaBlending($temp_wm,True); //设定图像的混色模式
- if (function_exists('ImageSaveAlpha')) ImageSaveAlpha($temp_wm,True); //保存完整的 alpha 通道信息
- //为图像添加水印
- if (function_exists('imageCopyMerge')) {
- ImageCopyMerge($temp,$temp_wm,$dst_x,$dst_y,0,0,$wminfo[0],$wminfo[1],$this->watermark_trans);
- } else {
- ImageCopyMerge($temp,$temp_wm,$dst_x,$dst_y,0,0,$wminfo[0],$wminfo[1]);
- }
- //保存图片
- switch ($fileinfo['mime']) {
- case 'image/jpeg' :
- @imageJPEG($temp,$file);
- break;
- case 'image/png' :
- @imagePNG($temp,$file);
- break;
- case 'image/gif' :
- @imageGIF($temp,$file);
- break;
- }
- //销毁零时图像
- @imageDestroy($temp);
- @imageDestroy($temp_wm);
- }
- }
- }
- //获取文件扩展名
- function fileext($filename) {
- return strtolower(substr(strrchr($filename,'.'),1,10));
- }
- }
- ?>
-
调用示例：
-
-
if ($_GET['action'] == 'save') {
-
- $up = new upload();
- $up->set_dir(dirname(__FILE__).'/upload/','{y}/{m}');
- $up->set_thumb(100,80);
- $up->set_watermark(dirname(__FILE__).'/jblog/images/watermark.png',6,90);
- $fs = $up->execute();
-
- var_dump($fs);
- }
- ?>
-
- test
-
-
-
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