$file = "/opt/data/upload/testfile.zip";
$outPath = "/opt/data/upload/testfile";
$zip = new ZipArchive();
$openRes = $zip->open($file);
if ($openRes === TRUE) {
  $zip->extractTo($outPath);
  $zip->close();
}

wget http://pecl.php.net/get/rar-4.0.0.tgz
gunzip rar-4.0.0.tgz
tar -xvf rar-4.0.0.tar
cd rar-4.0.0
phpize
./configure && make && make install
# 报错
configure: error: Cannot find php-config. Please use --with-php-config=PATH
# 运行./configure 时指定php-config路径即可
./configure --with-php-config=/usr/local/php/bin/php-config
make && make install

# 新建 /usr/local/php/conf.d/rar.ini，内容
extension=rar.so

$file = "/opt/data/upload/testfile.zip";
$outPath = "/opt/data/upload/testfile";
$rar_file = rar_open($file);
if ($rar_file) {
  $entries = rar_list($rar_file);
  foreach ($entries as $entry) {
    $entry->extract($outPath);
  }
  rar_close($rar_file);
}