排序多维数组PHP [英] Sort Multi-Dimensional Array PHP

问题描述

如何对以下数组进行排序，以便对房屋进行红色，绿色和蓝色的排序(乔治:位置0，史蒂夫:位置[1]，弗雷德:位置[2])?

How do I sort the following array so that the houses are sorted Red, Green and Blue (George: Position 0, Steve: Position [1], and Fred: Position [2])?

Array
(
    [catOne] => Array
        (
            [0] => Array
                (
                    [Opponent] => Steve
                    [House_Colour] => Green
                )

            [1] => Array
                (
                    [Opponent] => Fred 
                    [House_Colour] => Blue
                )

            [2] => Array
                (
                    [Opponent] => George 
                    [House_Colour] => Red
                )
        )

    [catTwo] => Array
        (
            [0] => Array
                (
                    [Opponent] => Peter 
                    [House Colour] => Green
                )

        )

)

我尝试使用sort()，asort()和usort()，但我什么都不需要呢?

I've tried using sort(), asort(), and usort() but nothing does what I need?

编辑:排序必须能够轻松更改.它可以是房屋颜色的任何顺序.所使用的顺序只是一个例子.

The sorting needs to be able to be changed easily. It can be in any order of House colour. The order used is just an example.

推荐答案

如果我了解您需要做什么，则可以使用

If I understand what you need to do, you can use usort:

usort($array, function($a, $b) {
    $sort = array('Red', 'Green', 'Blue');
    if (array_search($a['House_Colour'], $sort) > array_search($b['House_Colour'], $sort)) return 1;
    if (array_search($a['House_Colour'], $sort) < array_search($b['House_Colour'], $sort)) return -1;
    return 0;
});

如果您可以依靠定义而不是依靠字符串来获得房屋颜色，那么解决方案将更加简单高效.

If you can leverage on defines instead on relying on strings for the house colors the solutions will be straiforward and more efficient.

您应该在静态类中定义房屋颜色(以模拟枚举类型)

You should define the House colors in a static class (to simulate an enumerated type)

Class HouseColour {
    const Red = 0;
    const Green = 1;
    const Blue = 2;
}

在这种情况下，您必须声明一个对手/玩家

In this case you have to declare an opponent/player

 $opponent = array ( 'Opponent'=>'Steve', 'House_Colour'=>HouseColour::Green);

如果您对类和静态常量不满意(因为这样做确实很棒，您应该对它们感到不满意)，则可以采用一系列定义

If you are non confortable with class and static constants (you should be confortable with them as the benefits are really great) you can resort to a sequence of defines

define ('HC_Red',0);
define ('HC_Green', 1);
define ('HC_Blue', 2);

成为对手

 $opponent = array ( 'Opponent'=>'Steve', 'House_Colour'=>HC_Green);

在两种情况下，usort函数都相同:

in both cases the usort function is the same:

usort($array, function($a, $b) {
    if ($a['House_Colour'] > $b['House_Colour']) return 1;
    if ($a['House_Colour'] < $b['House_Colour']) return -1;
    return 0;
});

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