php支持分块与断点续传文件功能代码.doc

php支持分块与断点续传文件下载功能代码 本文章要介绍了这篇文章是一篇关于php流下载，就是可以支持分块与断点续传文件下载，有需要的朋友可以看看。 ?代码如下 复制代码 ? $dowmFile = dirname ( __FILE__ ) . /Nokia - Always Here.mp3; //要下载的文件，绝对或相对$dowmName = Nokia - Always Here.mp3;ob_start ();getlocalfile ( $dowmFile, $dowmName );flush ();ob_flush ();function getlocalfile($fname, $filename = ) {? $fsize = filesize ( $fname );? header ( Cache-Control: public );? header ( Pragma: public );? header ( Accept-Ranges: bytes );? header ( Connection: close );? header ( Content-Type: . MIMEType ( $fname ) );? //header(Content-Type: application/octet-stream);? if (isset ( $filename {0} )) {??? header ( Content-Disposition: attachment;filename= . $filename );? }? if ($fp = @fopen?( $fname, rb )) {??? $start = 0;??? $end = $fsize;??? $isRange = isset ( $_SERVER [HTTP_RANGE] ) ($_SERVER [HTTP_RANGE] != );??? if ($isRange) {??????preg_match?( /^bytes=([0-9]*)-([0-9]*)$/i, $_SERVER [HTTP_RANGE], $match );????? $start = $match [1];????? $end = $match [2];????? $isset_start = isset ( $start {0} );????? $isset_end = isset ( $end {0} );????? if ($isset_start $isset_end) {??????? //分块下载??????? if ($start = $fsize || $start 0 || $start $end) {????????? $start = 0;????????? $end = $fsize;??????? } else if ($end = $fsize) {????????? $end = $fsize - $start;??????? } else {????????? $end -= $start - 1;??????? }????? } else if ($isset_start ! $isset_end) {??????? //指定位置到结束??????? if ($start = $fsize || $start 0) {????????? $start = 0;????????? $end = $fsize;??????? } else {????????? $end = $fsize - $start;??????? }????? } else if (! $isset_start $isset_end) {??????? //最后n个字节??????? $end = $end $fsize ? $fsize : $end;??????? $start = $fsize - $end;????? } else {??????? $start = 0;??????? $end = $fsize;????? }??? }??? if ($isRange) {????? fseek ( $fp, $start );????? header ( HTTP/1.1 206 Partial Content );????? header ( Content-Length: . $end );????? header ( Content-Ranges: bytes . $start . - . ($end + $st