Linux系统下php获得系统分区信息的方法

$pars = array_filter(explode("\n",`df -h`));
foreach ($pars as $par) {
   if ($par{0} == '/') {
     $_tmp = array_values(array_filter(explode(' ',$par)));
     reset($_tmp);
     echo "分区挂载点：{$_tmp['5']}，" .
     "总大小：{$_tmp['1']}" .
     "已使用：{$_tmp['2']}({$_tmp['4']})<br/>";
   }
}