333 lines
9.3 KiB
PHP
333 lines
9.3 KiB
PHP
<?php
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class files{
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/**
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* upload
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*
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* 文件上传
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*
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* @param String $path e.g. could be the relative path of web htdocs directory
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* @param Array $files e.g. $_FILES['Filedata']
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* @param String $dir e.g. $_POST['dir']
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*
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* return Array $msg e.g. if($msg['error'])
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*/
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static function upload($path,$files,$dir)
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{
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$msg=array();
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//文件保存目录路径
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$save_path = $path;
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//文件保存目录URL
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$save_url = $path;
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//定义允许上传的文件扩展名
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$ext_arr = array(
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'image' => array('gif', 'jpg', 'jpeg', 'png', 'bmp'),
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'flash' => array('swf', 'flv'),
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'media' => array('swf', 'flv', 'mp3', 'wav', 'wma', 'wmv', 'mid', 'avi', 'mpg', 'asf', 'rm', 'rmvb'),
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'file' => array('doc', 'docx', 'xls', 'xlsx', 'ppt', 'htm', 'html', 'txt', 'zip', 'rar', 'gz', 'bz2'),
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'reviewatt'=>array('doc', 'docx', 'xls', 'xlsx', 'ppt', 'htm', 'html', 'txt', 'zip', 'rar', 'gz', 'bz2','gif', 'jpg', 'jpeg', 'png', 'bmp','pdf','odt'),
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'md'=>array('doc', 'docx', 'xls', 'xlsx', 'ppt', 'htm', 'html', 'txt', 'zip', 'rar', 'gz', 'bz2','gif', 'jpg', 'jpeg', 'png', 'bmp','pdf','odt'),
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'literature'=>array('doc', 'docx', 'xls', 'xlsx', 'ppt', 'htm', 'html', 'txt', 'zip', 'rar', 'gz', 'bz2','gif', 'jpg', 'jpeg', 'png', 'bmp','pdf','odt'),
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'document'=>array('doc', 'docx', 'xls', 'xlsx', 'ppt', 'htm', 'html', 'txt', 'zip', 'rar', 'gz', 'bz2','gif', 'jpg', 'jpeg', 'png', 'bmp','pdf','odt'),
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);
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//最大文件大小
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$max_size = 10485760;
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//$save_path = realpath($save_path). '/';
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//有上传文件时
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if (empty($files) === false) {
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//原文件名
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$file_name = $files['name'];
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//服务器上临时文件名
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$tmp_name = $files['tmp_name'];
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//文件大小
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$file_size = $files['size'];
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//目录名
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$dir_name = empty($dir) ? 'image' : trim($dir);
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//检查文件名
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if (!$file_name) {
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$msg['error'] = "请选择文件。";
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}
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//检查目录
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else if (@is_dir($save_path) === false) {
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$msg['error'] = "上传目录不存在。请联系管理员";
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}
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//检查目录写权限
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else if (@is_writable($save_path) === false) {
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$msg['error'] = "上传目录没有写权限。请联系管理员";
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}
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//检查是否已上传
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else if (@is_uploaded_file($tmp_name) === false) {
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$msg['error'] = "临时文件可能不是上传文件。或者文件类型不在允许的范围内，请重新上传";
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}
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//检查文件大小
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else if ($file_size > $max_size) {
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$msg['error'] = "上传文件大小超过限制。";
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}
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//检查目录名
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else if (empty($ext_arr[$dir_name])) {
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$msg['error'] = "目录名不正确。";
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}
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else
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{
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//获得文件扩展名
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$temp_arr = explode(".", $file_name);
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$file_ext = array_pop($temp_arr);
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$file_ext = trim($file_ext);
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$file_ext = strtolower($file_ext);
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//检查扩展名
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if (in_array($file_ext, $ext_arr[$dir_name]) === false) {
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$msg['error'] = "上传文件扩展名是不允许的扩展名。\n只允许" . implode(",", $ext_arr[$dir_name]) . "格式。";
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}
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else
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{
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//创建文件夹
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$dbsave = ""; //数据库中存放的路径
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if ($dir_name !== '') {
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$save_path .= $dir_name . "/";
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$save_url .= $dir_name . "/";
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$dbsave = $dir_name.'/';
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if (!file_exists($save_path)) {
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mkdir($save_path);
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}
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}
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$y = date("Y");
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$m = date("m");
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$d = date("d");
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$save_path .= $y . "/";
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$save_url .= $y . "/";
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$dbsave .= $y.'/';
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if (!file_exists($save_path)) {
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mkdir($save_path);
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}
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$save_path .= $m . "/";
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$save_url .= $m . "/";
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$dbsave .= $m.'/';
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if (!file_exists($save_path)) {
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mkdir($save_path);
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}
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$save_path .= $d . "/";
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$save_url .= $d . "/";
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$dbsave .= $d.'/';
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if (!file_exists($save_path)) {
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mkdir($save_path);
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}
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//新文件名
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$new_file_name = date("YmdHis") . '_' . rand(10000, 99999) . '.' . $file_ext;
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//移动文件
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$file_path = $save_path . $new_file_name;
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if (move_uploaded_file($tmp_name, $file_path) === false) {
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$msg['error'] = "上传文件失败。";
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}
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//数据库最终存储的文件
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$dbsave .= $new_file_name;
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@chmod($file_path, 0644);
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$file_url = $save_url . $new_file_name;
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$msg['file_url'] = $file_url;
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$msg['file_size'] = $file_size;
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$msg['db_path'] = $dbsave;
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$msg['realname'] = $file_name;
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$msg['file_type'] = $dir_name;
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}//检查扩展名
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}//目录正确性
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return $msg;
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}
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}//文件上传
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/**
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* getOne()
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*
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* 从数据库获取单个文件的信息
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*
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* @param int id
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*
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* return array
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*/
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static function getOne($db,$id){
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//下载单个附件
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$sql = $db->quoteInto("select a.* from attachments a where a.id=? order by a.ts_created desc",$id);
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$att = $db->fetchRow($sql);
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if(empty($att['id']))
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{ $att['error']=='文件不存在';}
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return $att;
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}
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/**
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* getImageType()
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*
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* 判断文件是否为图片，如果是图片，返回图片类型、创建函数、扩展名、质量
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*
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* return array
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*/
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static function getImageType($filename)
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{
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//通过mime判断是否是真正的图片
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$finfo = finfo_open(FILEINFO_MIME_TYPE);
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$mime = finfo_file($finfo, $filename);
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finfo_close($finfo);
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$type = $mime;
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if(!in_array($type,array('image/jpeg','image/png')))
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{
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return array('error'=>'F');
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}else{
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switch ($type){
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case 'image/jpeg':
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$image_create_func = 'imagecreatefromjpeg';
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$image_save_func = 'imagejpeg';
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$new_image_ext='jpg';
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$quality = 100;
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break;
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case 'image/gif':
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$image_create_func = 'imagecreatefromgif';
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$image_save_func = 'imagegif';
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$new_image_ext = 'gif';
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break;
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case 'image/png':
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$image_create_func = 'imagecreatefrompng';
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$image_save_func = 'imagepng';
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$new_image_ext = 'png';
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$quality = 100;
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break;
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default:
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$image_create_func = 'imagecreatefromjpeg';
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$image_save_func = 'imagejpeg';
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$new_image_ext='jpg';
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$quality = 100;
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}
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$downloadcfg = array('creatfunc'=>$image_create_func,
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'savefunc'=>$image_save_func,
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'ext'=>$new_image_ext,
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'mime'=>$mime,
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'quality'=>$quality);
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return $downloadcfg;
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}
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}//function getimagetype
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/**
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* thumb
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*
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*
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*
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*/
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static function thumb($filename,$w,$h){
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$imgct = files::getImageType($filename);
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if(isset($imgct['error'])) exit("Error");
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//var_dump($imgct);exit();
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$src = $imgct['creatfunc']($filename);
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list($width_orig, $height_orig) = getimagesize($filename);
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if($width_orig>$w)
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{
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$width = $w;
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$ratio = $width_orig/$w;
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$height = $height_orig/$ratio;
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}else{
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$width = $width_orig;
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$height = $height_orig;
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}
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// 重置图片尺寸
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$image_p = imagecreatetruecolor($width, $height);
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$white = imagecolorallocate($image_p, 255, 255, 255);
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imagefilledrectangle($image_p, 0, 0, $width, $height, $white);
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imagecopyresampled($image_p, $src, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);
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header("Content-type: image/jpeg");
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imagejpeg($image_p);
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imagedestroy($src);
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imagedestroy($image_p);
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}
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/**
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*/
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static function imageMark($filename,$w,$h){
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}
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/**
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* downloadFile
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*
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* 文件下载
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*
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* @param String $fullPath e.g. Zend_Registry::get('upload').$fileurl
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*
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* return file
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*/
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static function downloadFile( $fullPath ){
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//判断是否已经输出头部
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if( headers_sent() )
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{
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return false;
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}
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else{
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// Required for some browsers
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@apache_setenv('no-gzip', 1);
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@ini_set('zlib.output_compression', 0);
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// File Exists?
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if( file_exists($fullPath) ){
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// Parse Info / Get Extension
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$fsize = filesize($fullPath);
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$path_parts = pathinfo($fullPath);
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$ext = strtolower($path_parts["extension"]);
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// Determine Content Type
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switch ($ext) {
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case "pdf": $ctype="application/pdf"; break;
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case "exe": $ctype="application/octet-stream"; break;
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case "zip": $ctype="application/zip"; break;
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case "doc": $ctype="application/msword"; break;
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case "xls": $ctype="application/vnd.ms-excel"; break;
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case "ppt": $ctype="application/vnd.ms-powerpoint"; break;
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case "gif": $ctype="image/gif"; break;
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case "png": $ctype="image/png"; break;
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case "jpeg":
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case "jpg": $ctype="image/jpg"; break;
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default: $ctype="application/force-download";
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}
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header('Content-Description: File Transfer');
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header("Cache-Control: private",false);
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header("Content-Type: $ctype");
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header("Content-Disposition: attachment; filename=\"".basename($fullPath)."\";" );
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header("Content-Transfer-Encoding: binary\n");
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header("Expires: 0");
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header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
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header("Pragma: public");
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header("Content-Length: ".$fsize);
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ob_clean();
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flush();
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if(readfile($fullPath))
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return true;
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else
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return false;
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} else
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{return false;}
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}
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} //文件下载
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} |