php多维数组

$myfirst = array("中国");
$arr = array("first","second",$myfirst);
$arr1 = array($arr,"my");
echo $arr1[0][2][0];   // 结果是中国

$people = array("name"=>"张三","sex"=>"男","age"=>"19");
$student = array($people);
print_r($student[0]);
echo $student[0]["name"];   //张三