打印 PHP 多维数组中的键 [英] Print a key in a PHP multidimensional array

问题描述

我有一个多维数组，我想打印如下内容:

I have a multidimensional array and I want to print the contents as follows:

Sam
class1: 76
class2: 62
class3: 56
class4: 60

Matt
class1: 76
class2: 62
class3: 56
class4: 60

Dave
class1: 76
class2: 62
class3: 56
class4: 60

Steve
class1: 76
class2: 62
class3: 56
class4: 60

我的问题是我不知道如何引用第一个子数组的键(名称).key($index) 只是将输出中的所有名称替换为class1".到目前为止，这是我的代码:

My problem is that I don't know how to refer to the key of the first sub-array (the names). key($index) just replaces all of the names in the output with "class1". Here's my code so far:

$scoreList = array(
    "Sam" => array(
        "class1" => 76,
        "class2" => 62,
        "class3" => 56,
        "class4" => 60,
        ),
    "Matt" => array(
        "class1" => 76,
        "class2" => 62,
        "class3" => 56,
        "class4" => 60,
        ),
    "Dave" => array(
        "class1" => 76,
        "class2" => 62,
        "class3" => 56,
        "class4" => 60,
        ),
    "Steve" => array(
        "class1" => 76,
        "class2" => 62,
        "class3" => 56,
        "class4" => 60,
        ));

printGrade($scoreList["Sam"]);
printGrade($scoreList["Matt"]);
printGrade($scoreList["Dave"]);
printGrade($scoreList["Steve"]);

function printGrade($index) {
    Print key($index)."<br>";
    for($i = 1; $i <= 4; $i++)
    {
        Print "class".$i.": ".$index["class".$i]."<br>";
    };
    echo "<br>";
}

我对 Web 开发还很陌生，所以如果有人有任何提示，我将不胜感激！

I'm pretty new to web development, so if anyone has any hints I'd really appreciate it!

我是不是越来越近了...?

Am I getting closer...?

function printGrade($index) {
        foreach ($index as &$value) {
        print array_keys($index).": ".$value."<br>";
    }
    echo "<br>";
}

推荐答案

试试这个:

foreach($scoreList as $key => $val)
{
    echo $key."</br>";
    foreach( $val as $keyItem => $valKey)
    {
        echo $keyItem ." : ".$valKey."</br>";
    }
}   

输出:

Sam
class1 : 76
class2 : 62
class3 : 56
class4 : 60
Matt
class1 : 76
class2 : 62
class3 : 56
class4 : 60
Dave
class1 : 76
class2 : 62
class3 : 56
class4 : 60
Steve
class1 : 76
class2 : 62
class3 : 56
class4 : 60

这篇关于打印 PHP 多维数组中的键的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！