PHP实现打包下载文件的方法示例
这篇文章主要介绍了PHP实现打包下载文件的方法,涉及php基于curl的文件获取、遍历、zip压缩及下载等相关操作技巧,需要的朋友可以参考下。
本文实例讲述了PHP实现打包下载文件的方法,分享给大家供大家参考,具体如下:
- /**
- * 下载文件
- * @param $img
- * @return string
- */
- public function Download($img)
- {
- $items = [];
- $names = [];
- if($img)
- {
- //用于前端跳转zip链接拼接
- $path_redirect = '/zip/'.date('Ymd');
- //临时文件存储地址
- $path = '/tmp'.$path_redirect;
- if(!is_dir($path))
- {
- mkdir($path, 0777,true);
- }
- foreach ($img as $key => $value) {
- $fileContent = '';
- $fileContent = $this->CurlDownload($value['url']);
- if( $fileContent )
- {
- $__tmp = $this->SaveFile( $value['url'] , $path , $fileContent );
- $items[] = $__tmp[0];
- $names[] = $value['name'].'_'.($key+1).'.'.$__tmp[1];
- }
- }
- if( $items )
- {
- $zip = new ZipArchive();
- $filename = time().'download.zip';
- $zipname = $path.'/'.$filename;
- if (!file_exists($zipname)) {
- $res = $zip->open($zipname, ZipArchive::CREATE | ZipArchive::OVERWRITE);
- if ($res) {
- foreach ($items as $k => $v) {
- $value = explode("/", $v);
- $end = end($value);
- $zip->addFile($v, $end);
- $zip->renameName($end, $names[$k]);
- }
- $zip->close();
- } else {
- return '';
- }
- //通过前端js跳转zip地址下载,让不使用php代码下载zip文件
- //if (file_exists($zipname)) {
- //拼接附件地址
- //$redirect = 域名.$path_redirect.'/'.$filename;
- //return $redirect;
- //header("Location:".$redirect);
- //}
- //直接写文件的方式下载到客户端
- if (file_exists($zipname)) {
- header("Cache-Control: public");
- header("Content-Description: File Transfer");
- header('Content-disposition: attachment; filename=附件.zip'); //文件名
- header("Content-Type: application/zip"); //zip格式的
- header("Content-Transfer-Encoding: binary"); //告诉浏览器,这是二进制文件
- header('Content-Length: ' . filesize($zipname)); //告诉浏览器,文件大小
- @readfile($zipname);
- }
- //删除临时文件
- @unlink($zipname);
- }
- }
- return '';
- }
- }
- /**
- * curl获取链接内容
- * @param $url
- * @return mixed|string
- */
- public function CurlDownload($url) {
- $ch = curl_init($url);
- curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
- curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
- curl_setopt($ch, CURLOPT_HEADER, 0);
- curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
- curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
- curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
- $errno = curl_errno($ch);
- $error = curl_error($ch);
- $res=curl_exec($ch);
- curl_close($ch);
- if($errno>0){
- return '';
- }
- return $res;
- }
- /**
- * 保存临时文件
- * @param $url
- * @param $dir
- * @param $content
- * @return array
- */
- public function SaveFile( $url ,$dir , $content)
- {
- $fname = basename($url); //返回路径中的文件名部分
- $str_name = pathinfo($fname); //以数组的形式返回文件路径的信息
- $extname = strtolower($str_name['extension']); //把扩展名转换成小写
- $path = $dir.'/'.md5($url).$extname;
- $fp = fopen( $path ,'w+' );
- fwrite( $fp , $content );
- fclose($fp);
- return array( $path , $extname) ;
- }
引用:
$img = [['url'=>'地址url/1.jpg','name'=>'名字']];
Download($img);