is_array ,echo(" ");

 

<?php
$useconfig=array('a'=>'1111','b'=>'2222','c'=>'3333','d'=>array('d1'=>'444','d2'=>'5555'));
foreach ($useconfig as $key => $val)
{
if (is_array($useconfig[$key]))
{  echo $key.'是数组:';
   echo "<br />";
   $useconfig2=$val;
   foreach($useconfig2 as $key=>$val)
   {
     echo("&nbsp;"); echo("&nbsp;");
     echo $key.'=>'. $val;
     echo "<br />";
   }
}
else
{
echo $key.'=>'. $val;
echo "<br />";}
}
?>

结果:

a=>1111
b=>2222
c=>3333
d是数组:
  d1=>444
  d2=>5555