


PHP encapsulated multi-file upload class examples and detailed explanation of usage
PHPEncapsulated multi- file upload classExamples and usage details, the example tells the PHPencapsulated multi-file upload class examples and usage. Share it with everyone for your reference and study PHP, the details are as follows:
<?php /**//* * @(#)UploadFile.php * * 可同时处理用户多个上传文件。效验文件有效性后存储至指定目录。 * 可返回上传文件的相关有用信息供其它程序使用。(如文件名、类型、大小、保存路径) * 使用方法请见本类底部(UploadFile类使用注释)信息。 * */ class UploadFile { var $user_post_file = array(); //用户上传的文件 var $save_file_path; //存放用户上传文件的路径 var $max_file_size; //文件最大尺寸 var $last_error; //记录最后一次出错信息 //默认允许用户上传的文件类型 var $allow_type = array('gif', 'jpg', 'png', 'zip', 'rar', 'txt', 'doc', 'pdf'); var $final_file_path; //最终保存的文件名 var $save_info = array(); //返回一组有用信息,用于提示用户。 /**//** * 构造函数,用与初始化相关信息,用户待上传文件、存储路径等 * * @param Array $file 用户上传的文件 * @param String $path 存储用户上传文件的路径 * @param Integer $size 允许用户上传文件的大小(字节) * @param Array $type 此数组中存放允计用户上传的文件类型 */ function UploadFile($file, $path, $size = 2097152, $type = '') { $this->user_post_file = $file; $this->save_file_path = $path; $this->max_file_size = $size; //如果用户不填写文件大小,则默认为2M. if ($type != '') $this->allow_type = $type; } /**//** * 存储用户上传文件,检验合法性通过后,存储至指定位置。 * @access public * @return int 值为0时上传失败,非0表示上传成功的个数。 */ function upload() { for ($i = 0; $i < count($this->user_post_file['name']); $i++) { //如果当前文件上传功能,则执行下一步。 if ($this->user_post_file['error'][$i] == 0) { //取当前文件名、临时文件名、大小、扩展名,后面将用到。 $name = $this->user_post_file['name'][$i]; $tmpname = $this->user_post_file['tmp_name'][$i]; $size = $this->user_post_file['size'][$i]; $mime_type = $this->user_post_file['type'][$i]; $type = $this->getFileExt($this->user_post_file['name'][$i]); //检测当前上传文件大小是否合法。 if (!$this->checkSize($size)) { $this->last_error = "The file size is too big. File name is: ".$name; $this->halt($this->last_error); continue; } //检测当前上传文件扩展名是否合法。 if (!$this->checkType($type)) { $this->last_error = "Unallowable file type: .".$type." File name is: ".$name; $this->halt($this->last_error); continue; } //检测当前上传文件是否非法提交。 if(!is_uploaded_file($tmpname)) { $this->last_error = "Invalid post file method. File name is: ".$name; $this->halt($this->last_error); continue; } //移动文件后,重命名文件用。 $basename = $this->getBaseName($name, ".".$type); //移动后的文件名 $saveas = $basename."-".time().".".$type; //组合新文件名再存到指定目录下,格式:存储路径 + 文件名 + 时间 + 扩展名 $this->final_file_path = $this->save_file_path."/".$saveas; if(!move_uploaded_file($tmpname, $this->final_file_path)) { $this->last_error = $this->user_post_file['error'][$i]; $this->halt($this->last_error); continue; } //存储当前文件的有关信息,以便其它程序调用。 $this->save_info[] = array("name" => $name, "type" => $type, "mime_type" => $mime_type, "size" => $size, "saveas" => $saveas, "path" => $this->final_file_path); } } return count($this->save_info); //返回上传成功的文件数目 } /**//** * 返回一些有用的信息,以便用于其它地方。 * @access public * @return Array 返回最终保存的路径 */ function getSaveInfo() { return $this->save_info; } /**//** * 检测用户提交文件大小是否合法 * @param Integer $size 用户上传文件的大小 * @access private * @return boolean 如果为true说明大小合法,反之不合法 */ function checkSize($size) { if ($size > $this->max_file_size) { return false; } else { return true; } } /**//** * 检测用户提交文件类型是否合法 * @access private * @return boolean 如果为true说明类型合法,反之不合法 */ function checkType($extension) { foreach ($this->allow_type as $type) { if (strcasecmp($extension , $type) == 0) return true; } return false; } /**//** * 显示出错信息 * @param $msg 要显示的出错信息 * @access private */ function halt($msg) { printf("<b><UploadFile Error:></b> %s <br>\n", $msg); } /**//** * 取文件扩展名 * @param String $filename 给定要取扩展名的文件 * @access private * @return String 返回给定文件扩展名 */ function getFileExt($filename) { $stuff = pathinfo($filename); return $stuff['extension']; } /**//** * 取给定文件文件名,不包括扩展名。 * eg: getBaseName("j:/hexuzhong.jpg"); //返回 hexuzhong * * @param String $filename 给定要取文件名的文件 * @access private * @return String 返回文件名 */ function getBaseName($filename, $type) { $basename = basename($filename, $type); return $basename; } } /**//******************** UploadFile类使用注释 //注意,上传组件name属性不管是一个还是多个都要使用数组形式,如: <input type="file" name="user_upload_file[]"> <input type="file" name="user_upload_file[]"> //如果用户点击了上传按钮。 if ($_POST['action'] == "上传") { //设置允许用户上传的文件类型。 $type = array('gif', 'jpg', 'png', 'zip', 'rar'); //实例化上传类,第一个参数为用户上传的文件组、第二个参数为存储路径、 //第三个参数为文件最大大小。如果不填则默认为2M //第四个参数为充许用户上传的类型数组。如果不填则默认为gif, jpg, png, zip, rar, txt, doc, pdf $upload = new UploadFile($_FILES['user_upload_file'], 'j:/tmp', 100000, $type); //上传用户文件,返回int值,为上传成功的文件个数。 $num = $upload->upload(); if ($num != 0) { echo "上传成功<br>"; //取得文件的有关信息,文件名、类型、大小、路径。用print_r()打印出来。 print_r($upload->getSaveInfo()); //格式为: Array // ( // [0] => Array( // [name] => example.txt // [type] => txt // [size] => 526 // [path] => j:/tmp/example-1108898806.txt // ) // ) echo $num."个文件上传成功"; } else { echo "上传失败<br>"; } } */ ?>
The above is the example and usage of the multi-file upload class encapsulated in PHP. The explanations are all in the code, which is very convenient and easy to read. Understand
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