php多维数组

<?php
header("content-type:text/html;charset=utf-8");
$sites = array
(
"runoob"=>array
(
"菜鸟教程",
"http://www.runoob.com"
),
"google"=>array
(
"Google 搜索",
"http://www.google.com"
),
"taobao"=>array
(
"淘宝",
"http://www.taobao.com"
)
);

$dema = array(
"hanbing"=>array(
"寒冰剑",
"寒冰掌"

),
"jiansheng"=>array(
"冥想",
"无极剑道"

)

);
print("<pre>"); // 格式化输出数组
print_r($sites);
print("</pre>");

print("<pre>"); // 使用pre会是的包围在pre中的文本保留空格和换行符。
print_r($dema); //格式化输出数组 。
print("</pre>");

$aaa = "猪八戒";
echo $aaa;
//echo $dema;//这里会报错
$bbb = array("寒冰","剑圣","德玛");
//echo $bbb;echo和print不能打印数组变量
//print $bbb;
print("<pre>");
print_r($bbb);
print("</pre>");
echo "<br>";
echo "齐天大圣";
echo "<br>";
print $aaa;
var_dump($aaa);//可打印数据类型和值。
var_dump($bbb);

?>

?>