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Examples

See also the examples under rar:// wrapper.

Example #1 On-the-fly decompression

<?php

if (!array_key_exists("i"$_GET) || !is_numeric($_GET["i"]))
    die(
"Index unspecified or non-numeric");
$index = (int) $_GET["i"];
    
$arch RarArchive::open("example.rar");
if (
$arch === FALSE)
    die(
"Cannot open example.rar");

$entries $arch->getEntries();
if (
$entries === FALSE)
    die(
"Cannot retrieve entries");

if (!
array_key_exists($index$entries))
    die(
"No such index: $index");

$orfilename $entries[$index]->getName(); //UTF-8 encoded

$filesize $entries[$index]->getUnpackedSize();

/* you could check HTTP_IF_MODIFIED_SINCE here and compare with
 * $entries[$index]->getFileTime(). You could also send a
 * "Last modified" header */

$fp $entries[$index]->getStream();
if (
$fp === FALSE)
    die(
"Cannot open file with index $index insided the archive.");

$arch->close(); //no longer needed; stream is independent

function detectUserAgent() {
    if (!
array_key_exists('HTTP_USER_AGENT'$_SERVER))
        return 
"Other";
    
    
$uas $_SERVER['HTTP_USER_AGENT'];
    if (
preg_match("@Opera/@"$uas))
        return 
"Opera";
    if (
preg_match("@Firefox/@"$uas))
        return 
"Firefox";
    if (
preg_match("@Chrome/@"$uas))
        return 
"Chrome";
    if (
preg_match("@MSIE ([0-9.]+);@"$uas$matches)) {
        if (((float)
$matches[1]) >= 7.0)
            return 
"IE";
    }
    
    return 
"Other";
}

/*
 * We have 3 options:
 * - For FF and Opera, which support RFC 2231, use that format.
 * - For IE and Chrome, use attwithfnrawpctenclong
 *   (http://greenbytes.de/tech/tc2231/#attwithfnrawpctenclong)
 * - For the others, convert to ISO-8859-1, if possible
 */
$formatRFC2231 'Content-Disposition: attachment; filename*=UTF-8\'\'%s';
$formatDef 'Content-Disposition: attachment; filename="%s"';

switch (
detectUserAgent()) {
    case 
"Opera":
    case 
"Firefox":
        
$orfilename rawurlencode($orfilename);
        
$format $formatRFC2231;
        break;

    case 
"IE":
    case 
"Chrome":
        
$orfilename rawurlencode($orfilename);
        
$format $formatDef;
        break;
    default:
        if (
function_exists('iconv'))
            
$orfilename =
                @
iconv("UTF-8""ISO-8859-1//TRANSLIT"$orfilename);
        
$format $formatDef;
}

header(sprintf($format$orfilename));
//cannot send error messages from now on (headers already sent)

//replace by real content type, perhaps infering from the file extension
$contentType "application/octet-stream";
header("Content-Type: $contentType");

header("Content-Transfer-Encoding: binary");

header("Content-Length: $filesize");

if (
$_SERVER['REQUEST_METHOD'] == "HEAD")
    die();
    
while (!
feof($fp)) {
    
$s = @fread($fp8192);
    if (
$s === false)
        break; 
//useless to send error messages
  
    
echo $s;
}
?>

This example opens a RAR file and presents the requested file inside the RAR archive for download to the client.

Example #2 RAR extension filesystem extraction example

<?php

$rar_file 
rar_open('example.rar') or die("Can't open Rar archive");

$entries rar_list($rar_file);

foreach (
$entries as $entry) {
    echo 
'Filename: ' $entry->getName() . "\n";
    echo 
'Packed size: ' $entry->getPackedSize() . "\n";
    echo 
'Unpacked size: ' $entry->getUnpackedSize() . "\n";

    
$entry->extract('/dir/extract/to/');
}

rar_close($rar_file);

?>

This example opens a RAR file archive and extracts each entry to the specified directory.

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