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 />";
}
?>