PHP implementation file Download breakpoint continuation

<?php

/** PHP Download Breakpoint continued * From:php100*/functionDl_file_resume ($file){      //detects if a file exists    if(!Is_file($file)) { die("<b>404 File not Found!</b>"); }                   $len=filesize($file);//Get File Size    $filename=basename($file);//Get file name    $file _extension=Strtolower(substr(STRRCHR($filename, "."), 1);//get file name extension//Indicate output browser format according to extension    Switch($file _extension ) {          Case"EXE":$ctype= "Application/octet-stream"; Break;  Case"Zip":$ctype= "Application/zip"; Break;  Case"MP3":$ctype= "Audio/mpeg"; Break;  Case"MPG":$ctype= "Video/mpeg"; Break;  Case"Avi":$ctype= "Video/x-msvideo"; Break; default:$ctype= "Application/force-download"; }            //Begin Writing Headers    Header("Cache-control:"); Header("Cache-control:public"); //setting the output browser format    Header("Content-type:$ctype"); if(strstr($_server[' Http_user_agent '], "MSIE")) {//if it is IE browser        #workaround for IE filename bug with multiple periods/multiple dots in filename        #That adds square brackets to Filename-eg. Setup.abc.exe becomes Setup[1].abc.exe        $iefilename=Preg_replace('/\\./', '%2e ',$filename,Substr_count($filename, ‘.‘) -1); Header("Content-disposition:attachment; Filename=\\ "$iefilename\\""); } Else {         Header("Content-disposition:attachment; Filename=\\ "$filename\\""); }     Header("Accept-ranges:bytes"); $size=filesize($file); //If there is a $_server[' http_range ' parameter    if(isset($_server[' Http_range '])) { /*---------------------------Range Header field a range header field can request one or more child ranges of an entity. For example, represents the first 500 bytes: bytes=0-499 represents the second 500 bytes: bytes=500-999 represents the last 500 bytes: bytes=-500 represents the range after 500 bytes: bytes=500-First and last byte: Byte    S=0-0,-1 specifies several ranges: bytes=500-600,601-999 but the server can ignore this request header, and if the unconditional get contains a range request header, the response is returned as a status code of 206 (partialcontent) instead of a (OK). ---------------------------*/      //the value of $_server[' Http_range '] is connected again after the breakpoint bytes=4390912-             List($a,$range)=Explode("=",$_server[' Http_range ']); //If yes, download missing part        Str_replace($range, "-",$range);//What does that say?    $size 2=$size-1;//total number of files bytes        $new _length=$size 2-$range;//get the length of the next download        Header("http/1.1 206 Partial Content"); Header("Content-length:$new _length");//Input Total length        Header("Content-range:bytes$range $size2/$size");//when Content-range:bytes 4908618-4988927/4988928 95%,}Else{//First time Connection        $size 2=$size-1; Header("Content-range:bytes 0-$size 2/$size");//content-range:bytes 0-4988927/4988928        Header("Content-length:".)$size);//Total output Length    }     //Open File    $fp=fopen("$file"," RB "); //Set pointer position    fseek($fp,$range); //Unreal Output     while(!feof($fp)){         //set the maximum file execution time        Set_time_limit(0); Print(fread($fp, 1024*8));//Output File        Flush();//output buffering        Ob_flush(); }     fclose($fp); Exit; } Dl_file_resume ("1.zip");//1.zip file of the sibling directory//---------------------------------------//File download is not supported for the continuation of the breakpoint. //---------------------------------------Downfile ("1.zip"); functionDownfile ($sFilePath) {    if(file_exists($sFilePath)){        $aFilePath=Explode("/",Str_replace("\\\\","/",$sFilePath),$sFilePath); $sFileName=$aFilePath[Count($aFilePath)-1]; $nFileSize=filesize($sFilePath); Header("Content-disposition:attachment; Filename= ".$sFileName); Header("Content-length:".)$nFileSize); Header("Content-type:application/octet-stream"); ReadFile($sFilePath); }    Else   {        Echo("File does not exist!")); } } ?>//This fragment is from http://www.codesnippet.cn/detail/24112012641.html

Source Address: http://www.phpxs.com/code/1009963/

PHP implementation file Download breakpoint continuation