php数组输出三种形式

$bbbb=array("11"=>"aaa","22"=>"bbb");
//只能输出值value不能输出key
foreach($bbbb as $color)
echo $color;
//value与key都可输出
foreach($bbbb as $key=>$value)
echo $key."=>".$value;
//value与key都可输出
while($color=each($bbbb)){
echo $color['key'];
}