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이 문서에서는 PHP 중국어 웹사이트 매뉴얼 풀어 주다
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 ();
$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" ;
}
$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 ( $fp , 8192 );
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 ( $rar_file );
?>
This example opens a RAR file archive and extracts each entry to the specified directory.
[#1] Nitrogen [2010-11-17 08:43:22]
A veeery simple function to RAR files, I'm not proud of it.
Since there's no way to create RAR files in PHP (due to licensing, patents or whatever), I'm taking some advantage from the command-line RARing tool that comes with WinRAR (in the WinRAR program files named "rar.exe").
<?php
function RARFiles($Output='output.rar',$Files=array()) {
$Data='';
for($i=0;$i<count($Files);$i++)
$Data.="\"{$Files[$i]}\" ";
exec("rar.exe a \"{$Output}\" {$Data}");
}
$Files=array('file1.ext','file2.ext','file3.ext');
RARFiles('asdf.rar',$Files);
// asdf.rar created.
?>
There's no error checking, so make sure you check that your expected RAR file exists before doing anything with it.
Hopefully one day, PHP will be able to be allowed to create RAR files.