如何在 php 中使用变量指定数组？

Question

我需要有关如何使用变量指定数组名称或键的帮助？ 试了无数次都没成功

在我进入代码之前，$games 是数组，我在底部显示它

这是我的代码（我将在底部显示数组示例）

$increment = 0; //increment i use in a while loop +1 per loop starting at 0
$increment2 = increment - 1; // to get the game number i need to minus 1 from $increment, 
//this works since the array starts at 0 and increment will be 1 when the while loop  starts.

$gamestotal = $games[totalGames]; //This number is different everytime, it is always 
//between 1-1000, it counts the number of a games a person has.
$gamesnpcommid = $games[$increment2][npcommid]; //each game has a unique code, i cURL this 
//info from Sony servers and return it in an array (array example below) This is the part 
//that is not working, to help understand please check array first, this variable is used   
//in the while loop and i need it to start at array 0 and keep returning the unique code
//until the loops stops at the final array number.

//这里是循环

while($increment<$gamestotal)

    if($increment % 2 == 0){
    $increment=$increment+1;
        echo "<tr>";
        echo "<td style='background-color:#e6e8fa'>";
        echo $gamesnpcommid;
        echo "</td>";
        echo "</tr>";
    }
    else
    {$increment=$increment+1;
        echo "<tr>";
        echo "<td style='background-color:adeaea'>";
        echo $gamesnpcommid;
        echo "</td>";
        echo "</tr>";
    }

echo "</table>";

一切正常，但数组引用不起作用 ($gamesnpcommid)，下面是数组 $games 的示例：

数组存储在变量$games中，

Array
(
    [totalGames] => 110
    [0] => Array
        (
            [npcommid] => NPWR00507_00
            [platinum] => 0
            [gold] => 1
            [silver] => 11
            [bronze] => 32
            [total] => 44
            [lastupdated] => 1329258539
        )

    [1] => Array
        (
            [npcommid] => NPWR01140_00
            [platinum] => 1
            [gold] => 4
            [silver] => 8
            [bronze] => 29
            [total] => 42
            [lastupdated] => 1328586022
        )

    [2] => Array
        (
            [npcommid] => NPWR01118_00
            [platinum] => 0
            [gold] => 0
            [silver] => 3
            [bronze] => 8
            [total] => 11
            [lastupdated] => 1328067349
        )
    )

谁能给我解释一下为什么，例如，如果$increment2 = 2 然后当我尝试使用$games[$increment2][npcommid] 引用数组时，它不会像数组中那样返回 NPWR01118_00？ 但是当我使用$games[2][npcommid] 时它可以工作吗？ 我已经完成了彻底的调试，我知道数组可以工作，但我现在很难过。

Answer 1

您可以随时添加error_reporting(E_ALL); 以了解您遇到了哪个错误，正在处理同一个项目

Answer 2

试试

$games[$increment2]["npcommid"] 

而不是

$games[$increment2][npcommid]

换句话说，关联键总是必须被引用。