<?php class upload{ private $dir; //附件存放物理目录 private $time; //自定义文件上传时间 private $allow_types; //允许上传附件类型 private $field; //上传控件名称 private $maxsize; //最大允许文件大小，单位为KB private $thumb_width; //缩略图宽度 private $thumb_height; //缩略图高度 private $watermark_file; //水印图片地址 private $watermark_pos; //水印位置 private $watermark_trans; //水印透明度 /** * 构造函数 * @param $types 上传图片类型 * @param $maxzize 上传文件大小 * @param $filed 上传表单名称 * @param $time 上传文件时间 */ function upload($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(); } /** * 设置图片存放路径 * @param $basedir 图片保存路径 * @param $filedir 图片保存子目录 */ function set_dir($basedir,$filedir='') { $dir = $basedir; //获取自定义目录 $dir = str_replace('\','/',$dir); $self_dir =str_replace('\','/',dirname(__FILE__)); if($dir!=$self_dir && strlen($dir) > strlen($self_dir)) { $mydir = substr($dir,strrpos($dir,'/',-2)); } !is_dir($dir) && @mkdir($dir,0777); if(!empty($filedir)) { $filedir = str_replace(array('{y}','{m}','{d}'), array(date('Y',$this->time),date('m',$this->time),date('d',$this->time)), strtolower($filedir) ); $this->mydir = $mydir.$filedir.'/'; $dirs = explode('/',$filedir); foreach ($dirs as $d) { !empty($d) && $dir .=$d.'/'; !is_dir($dir) && @mkdir($dir,0777); } } $this->dir = $dir; } /** * 设置缩略图大小 * @param $width 缩略图宽 * @param $height 缩略图高 */ function set_thumb($width=0,$height=0) { $this->thumb_width =$width; $this->thumb_height =$height; } /** * 设置水印属性 * @param $file 水印文件名 * @param $pos 水印位置 * @param $trans 水印透明图 */ function set_watermark($file,$pos = 0, $trans =80) { $this->watermark_file = $file; $this->watermark_pos = $pos; $this->watermark_trans = $trans; } /** * 执行图片上传水印处理 * @return Ambigous <multitype:, number, string> */ function execute() { $files = array(); $field = $this->field; $keys = array_keys($_FILES[$field]['name']); foreach ($keys as $key) { if(!$_FILES[$field]['name'][$key]) continue; //获取文件扩展名 $fileext = $this->fileext($_FILES[$field]['name'][$key]); //生成文件名 $filename = $this->time.mt_rand(100,999).'.'.$fileext; //实际存放目录 $filedir = $this->dir; //文件大小 $filesize = $_FILES[$field]['size'][$key]; //文件类型不允许 if(!in_array($fileext,$this->allow_types)) { $files[$key]['name'] =$_FILES[$field]['name'][$key]; $files[$key]['flags'] = 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; $files[$key]['relative_dir'] = $this->mydir; //保存上传文件并删除临时文件 if(is_uploaded_file($_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)) { //缩略图文件名 $files[$key]['thumb'] = 'thumb_'.$filename; } } $this->create_watermark($filedir.$filename); } } } return $files; } /** * 生成缩略图 * @param $src_file 源图片 * @param $thumb_file 缩略图 * @return boolean */ function create_thumb($src_file,$thumb_file) { $t_width = $this->thumb_width; $t_height = $this->thumb_height; if(!file_exists($src_file)) return false; $src_info = getImageSize($src_file); //如果来源图像小于或等于缩略图刚拷贝源图像作为缩略图 if($src_info[0] <=$t_width && $src_info[1] <= $t_height) { if(!copy($src_file,$thumb_file)) { return false; } return true; } //按比例计算缩略图大小 if($src_info[0] - $t_width > $src_info[1] - $t_height) { $t_height = ($t_width / $src_info[0]) * $src_info[1]; }else { $t_width = ($t_height / $src_info[1]) * $src_info[0]; } //取得文件扩展名 $fileext = $this->fileext($src_file); switch ($fileext) { case 'jpg' : $src_img = ImageCreateFromJPEG($src_file); break; case 'png' : $src_img = ImageCreateFromPNG($src_file); break; case 'gif' : $src_img = ImageCreateFromGIF($src_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,$src_img,0,0,0,0,$t_width,$t_height,$src_info[0],$src_info[1]); } else { @ImageCopyResized($thumb_img,$src_img,0,0,0,0,$t_width,$t_height,$src_info[0],$src_info[1]); } //输出生成的缩略图 switch ($fileext) { case 'jpg' : ImageJPEG($thumb_img,$thumb_file,90); break; case 'gif' : ImageGIF($thumb_img,$thumb_file); break; case 'png' : ImagePNG($thumb_img,$thumb_file); break; } //销毁临时图像 @ImageDestroy($src_img); @ImageDestroy($thumb_img); return true; } /** * 设置水印 * @param $file 水印图片 */ function create_watermark($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] < $wminfo[0] || $fileinfo[1] < $wminfo[1]) return; if(array_key_exists($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']] ($this->watermark_file); switch ($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 = $fileinfo[1]-$fileinfo[1]; break; default ://随机 $dst_x = mt_rank(0,$fileinfo[0]-$wminfo[0]); $dst_y = mt_rank(0,$fileinfo[1]-$wminfo[1]); } //设定图像的混色模式 if(function_exists('ImageAlphaBlending')) ImageAlphaBlending($temp_wm,true); //保存完整的 alpha 通道信息 if(function_exists('ImageSaveAlpha')) ImageSaveAlpha($temp_wm,true); //为图像添加水印 if(function_exists('imageCopyMerge')) { ImageCopymerge($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]); } 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 * @param unknown_type $filename * @return string */ function fileext($filename) { return strtolower(substr(strrchr($filename,'.'),1,10)); } } ?> <?php if (isset($_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); } ?> <html> <head><title>test</title></head> <body style="margin:0;padding:0"> <form name="upload" method="post" action="?action=save" enctype="multipart/form-data" style="margin:0"> <input type="file" name="attach[]" /> <input type="file" name="attach[]" /> <input type="submit" name="submit" value="上 传" /> </form> </body> </html>