压缩扩展php数组对象
最近有一个需求：将rar压缩文件里面的文件名、大小获取出来，解析成json输出来；
查阅了无数资料，得知添加php_rar.dll(如果是zip的话，就添加php_zip.dll扩展)，最后通过程序得到rar的相关内容，但对里面获取到的内容格式不知道怎么解析成json，求大神指点一二。
$rar_file = rar_open('222.rar') or die("Failed to open Rar archive");
$entries_list = rar_list($rar_file);
header('Content-Type: text/plain');
print_r($entries_list);得到数据如下：
Array
(
[0] => RarEntry Object
(
[rarfile:RarEntry:private] => RarArchive Object
(
)[position:RarEntry:private] => 0 [name:RarEntry:private] => tar.php [unpacked_size:RarEntry:private] => 64332 [packed_size:RarEntry:private] => 11726 [host_os:RarEntry:private] => 2 [file_time:RarEntry:private] => 2012-07-09 23:47:06 [crc:RarEntry:private] => 69e1487f [attr:RarEntry:private] => 128 [version:RarEntry:private] => 29 [method:RarEntry:private] => 51 [flags:RarEntry:private] => 32928 ) [1] => RarEntry Object ( [rarfile:RarEntry:private] => RarArchive Object ( ) [position:RarEntry:private] => 1 [name:RarEntry:private] => upload.php [unpacked_size:RarEntry:private] => 2461 [packed_size:RarEntry:private] => 1033 [host_os:RarEntry:private] => 2 [file_time:RarEntry:private] => 2012-07-09 23:47:06 [crc:RarEntry:private] => ecc4a20d [attr:RarEntry:private] => 128 [version:RarEntry:private] => 29 [method:RarEntry:private] => 51 [flags:RarEntry:private] => 32928 ) [2] => RarEntry Object ( [rarfile:RarEntry:private] => RarArchive Object ( ) [position:RarEntry:private] => 2 [name:RarEntry:private] => urlupload.php [unpacked_size:RarEntry:private] => 1877 [packed_size:RarEntry:private] => 864 [host_os:RarEntry:private] => 2 [file_time:RarEntry:private] => 2012-07-09 23:47:06 [crc:RarEntry:private] => 44a999a9 [attr:RarEntry:private] => 128 [version:RarEntry:private] => 29 [method:RarEntry:private] => 51 [flags:RarEntry:private] => 32928 ) [3] => RarEntry Object ( [rarfile:RarEntry:private] => RarArchive Object ( ) [position:RarEntry:private] => 3 [name:RarEntry:private] => user.php [unpacked_size:RarEntry:private] => 402 [packed_size:RarEntry:private] => 222 [host_os:RarEntry:private] => 2 [file_time:RarEntry:private] => 2012-07-09 23:47:06 [crc:RarEntry:private] => 22db657e [attr:RarEntry:private] => 128 [version:RarEntry:private] => 29 [method:RarEntry:private] => 51 [flags:RarEntry:private] => 32928 ) )
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