


A brief discussion on the function of php fopen to download remote files
As shown below:
//下载附件 function get_file($url, $folder = "./") { set_time_limit (24 * 60 * 60); // 设置超时时间 $destination_folder = $folder . '/'; // 文件下载保存目录,默认为当前文件目录 if (!is_dir($destination_folder)) { // 判断目录是否存在 mkdirs($destination_folder); // 如果没有就建立目录 } $newfname = $destination_folder . basename($url); // 取得文件的名称 $file = fopen ($url, "rb"); // 远程下载文件,二进制模式 if ($file) { // 如果下载成功 $newf = fopen ($newfname, "wb"); // 远在文件文件 if ($newf) // 如果文件保存成功 while (!feof($file)) { // 判断附件写入是否完整 fwrite($newf, fread($file, 1024 * 8), 1024 * 8); // 没有写完就继续 } } if ($file) { fclose($file); // 关闭远程文件 } if ($newf) { fclose($newf); // 关闭本地文件 } return true; } function mkdirs($path , $mode = "0755") { if (!is_dir($path)) { // 判断目录是否存在 mkdirs(dirname($path), $mode); // 循环建立目录 mkdir($path, $mode); // 建立目录 } return true; } // 使用示例 echo get_file('xxxxx.pdf');
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