php中的数组

在php中数组使用array()形式来定义

eg:

<?php$students = array(    '2010'=>array('令狐冲',"59"),    '2011'=>array('林平之',"44"),    '2012'=>array('曲洋',"89"),    '2013'=>array('任盈盈',"92"),    '2014'=>array('向问天',"93"),    '2015'=>array('任我行',"87"),    '2016'=>array('冲虚',"58"),    '2017'=>array('方正',"74"),    '2018'=>array('岳不群',"91"),    '2019'=>array('宁中则',"90"),);//10个学生的学号、姓名、分数，用数组存储/*foreach($students as $key=>$v)*/foreach($students as $key=>$val){ //使用循环结构遍历数组,获取学号    echo $key; //输出学号    echo ":";    //循环输出姓名和分数    /*foreach($val as $v)*/             //对上一层进行遍历    foreach($val as $v)                 //前面一层是需要遍历的数组    {        echo $v;    }    echo "<br />";}?>