本文实例讲述了PHP实现HTTP断点续传的方法。分享给大家供大家参考。具体实现方法如下：

<?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 = $path."/".$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."-".$size2."/".$size);  } else {    header("Content-Length:".$size);    header("Content-Range: bytes 0-".$size2."/".$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);}

希望本文所述对大家的php程序设计有所帮助。