About PHP support block and breakpoint resume file download function code _php tips

This article is to introduce this article is about PHP streaming, that is, can support the block and breakpoint file download, there is a need for friends to see. The code is as follows

Copy Code code as follows:

$dowmFile = DirName (__file__). '/nokia–always here.mp3′; To download the file, absolute or relative
$dowmName = ' Nokia–always here.mp3′;
Ob_start ();
Getlocalfile ($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 && $isset _end) {
Block download
if ($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 &&! $isset _end) {
Specify location to end
if ($start >= $fsize | | $start < 0) {
$start = 0;
$end = $fsize;
} else {
$end = $fsize – $start;
}
else if (! $isset _start && $isset _end) {
Last N bytes
$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 + $start – 1). ‘/' . $fsize);
} else {
Header (' Content-length: '. $fsize);
}
if (function_exists (' Fpassthru ') && ($end + $start) = = $fsize) {
Fpassthru ($FP);
} else {
Echo fread ($fp, $end);
}
} else {
Header (' Content-length: '. $fsize);
ReadFile ($fname);
}
@header ("Content-type:". Mime_content_type ($fname));
}
function MimeType ($fname) {
$fileSuffix = Strtolower (substr ($fname, Strrpos ($fname, '. ') + 1));
Switch ($fileSuffix) {
Case ' avi ':
Return ' Video/msvideo ';
Case ' WMV ':
Return ' video/x-ms-wmv ';
Case ' txt ':
Return ' Text/plain ';
Case ' htm ':
Case ' HTML ':
Case ' PHP ':
Return ' text/html ';
Case ' CSS ':
Return ' text/css ';
Case ' JS ':
Return ' Application/javascript ';
Case ' JSON ':
Case ' XML ':
Case ' Zip ':
Case ' PDF ':
Case ' RTF ':
Case ' tar ':
Return ' application/'. $fileSuffix;
Case ' SWF ':
Return ' Application/x-shockwave-flash ';
Case ' flv ':
Return ' video/x-flv ';
Case ' JPE ':
Case ' jpg ':
Return ' Image/jpeg ';
Case ' JPEG ':
Case ' PNG ':
Case ' gif ':
Case ' BMP ':
Case ' TIFF ':
Return ' image/'. $fileSuffix;
Case ' ico ':
Return ' Image/vnd.microsoft.icon ';
Case ' TIF ':
Return ' Image/tiff ';
Case ' svg ':
Case ' Svgz ':
Return ' Image/svg+xml ';
Case ' rar ':
Return ' application/x-rar-compressed ';
Case ' EXE ':
Case ' MSI ':
Return ' application/x-msdownload ';
Case ' cab ':
Return ' application/vnd.ms-cab-compressed ';
Case ' AIF ':
Return ' Audio/aiff ';
Case ' mpg ':
Case ' MPE ':
Case ' mp3′:
Return ' Audio/mpeg ';
Case ' MPEG ':
Case ' wav ':
Case ' AIFF ':
Return ' audio/'. $fileSuffix;
Case ' QT ':
Case ' mov ':
Return ' Video/quicktime ';
Case ' PSD ':
Return ' Image/vnd.adobe.photoshop ';
Case ' AI ':
Case ' EPS ':
Case ' PS ':
Return ' Application/postscript ';
Case ' Doc ':
Case ' docx ':
Return ' Application/msword ';
Case ' xls ':
Case ' XLT ':
Case ' XLM ':
Case ' XLD ':
Case ' XLA ':
Case ' XLC ':
Case ' XLW ':
Case ' XLL ':
Return ' application/vnd.ms-excel ';
Case ' ppt ':
Case ' PPS ':
Return ' Application/vnd.ms-powerpoint ';
Case ' ODT ':
Return ' Application/vnd.oasis.opendocument.text ';
Case ' ODS ':
Return ' Application/vnd.oasis.opendocument.spreadsheet ';
Default:
if (function_exists (' Mime_content_type ')) {
$fileSuffix = Mime_content_type ($filename);
} else {
$fileSuffix = ' Application/octet-stream ';
}
return $fileSuffix;
Break
}
}