PHP实现HTTP断点续传的方法

<?php /** * PHP-HTTP断点续传实现 * @param string $path: 文件所在路径 * @param string $file: 文件名 * @return void */ function download($path,$file) { $real = $path.'https://www.jb51.net/'.$file; if(!file_exists($real)) { return false; } $size = filesize($real); $size2 = $size-1; $range = 0; if(isset($_SERVER['HTTP_RANGE'])) { header('HTTP /1.1 206 Partial Content'); $range = str_replace('=','-',$_SERVER['HTTP_RANGE']); $range = explode('-',$range); $range = trim($range[1]); header('Content-Length:'.$size); header('Content-Range: bytes '.$range.'-'.$size2.'https://www.jb51.net/'.$size); } else { header('Content-Length:'.$size); header('Content-Range: bytes 0-'.$size2.'https://www.jb51.net/'.$size); } header('Accenpt-Ranges: bytes'); header('application/octet-stream'); header("Cache-control: public"); header("Pragma: public"); //解决在IE中下载时中文乱码问题 $ua = $_SERVER['HTTP_USER_AGENT']; if(preg_match('/MSIE/',$ua)) { $ie_filename = str_replace('+','%20',urlencode($file)); header('Content-Dispositon:attachment; filename='.$ie_filename); } else { header('Content-Dispositon:attachment; filename='.$file); } $fp = fopen($real,'rb+'); fseek($fp,$range); while(!feof($fp)) { set_time_limit(0); print(fread($fp,1024)); flush(); ob_flush(); } fclose($fp); }