php中使用while遍历二维数组的方法

<?php
$contact=array(
	'gao'=>array('ID'=>1,'name'=>'高某','company'=>'A公司','addr'=>'北京市','phonenumber'=>'(010)98765432','email'=>'gao@mail.com'),
        'li'=>array('ID'=>2,'name'=>'李某','company'=>'B公司','addr'=>'上海市','phonenumber'=>'(021)98765432','email'=>'li@mail.com'),
	'ma'=>array('ID'=>3,'name'=>'马某','company'=>'C公司','addr'=>'重庆市','phonenumber'=>'(023)98765432','email'=>'ma@mail.com'),
	'fan'=>array('ID'=>4,'name'=>'范某','company'=>'D公司','addr'=>'天津市','phonenumber'=>'(022)98765432','email'=>'fan@mail.com')
);

while(list($key,$value)=each($contact)){
	while(list($name,$info)=each($value)){
             echo $name.':'.$info.'<br>';
	}
	echo "------------------------------------<br>";
}
?>