PHP关联数组-如何根据条件匹配值

Question

我正在通过另一个页面上的cookie传递团队名称。 当用户到达新页面时，我检查该团队名称是否在我的数组中存在，然后执行某些操作，如果不执行其他操作。 这很好。 但是，如果条件为真，我想将变量$ team_color设置为找到团队名称的嵌套数组中的颜色。

我不知道如何访问它。

我目前正在尝试访问array_values，但是没有运气。 任何建议将不胜感激。

这是我到目前为止所拥有的-

if(isset($_COOKIE['TEAM']))

{

$team_cookie = $_COOKIE['TEAM'];

$team_info=Array (

    '0' => Array (

            'team_name' => 'team1',
            'team_color' => 'red'
        ),

    '1' => Array (

            'team_name' => 'team2',
            'team_color' => 'blue'
        ),

    '2' => Array (

            'team_name' => 'team3',
            'team_color' => 'green'
        ),

    '3' => Array (

            'team_name' => 'team4',
            'team_color' => 'yellow'
    )
);

if(in_array($team_cookie, array_column($team_info, 'team_name'))) { 


   $team_color = array_values($team_info, 'team_color');


    // Do something        

}

}

Answer 1

因此，要获取团队名称的团队颜色，您应该重组$team_info数组，以便以键作为团队名称和值作为团队颜色的方式更快地进行访问。 我们首先使用array_column检索所有team names ，然后为team_color检索相同的team_color 。 稍后，我们使用array_combine()将第一个数组值作为键，将第二个数组值作为那些键的值。 像下面这样

<?php

$team_info = array_combine(array_column($team_info,'team_name'),array_column($team_info,'team_color'));

上面的代码根据以下内容对其进行了重组：

Array
(
    [0] => Array
        (
            [team_name] => team1
            [team_color] => red
        )

    [1] => Array
        (
            [team_name] => team2
            [team_color] => blue
        )

    [2] => Array
        (
            [team_name] => team3
            [team_color] => green
        )

    [3] => Array
        (
            [team_name] => team4
            [team_color] => yellow
        )

)

至

Array
(
    [team1] => red
    [team2] => blue
    [team3] => green
    [team4] => yellow
)

现在，您可以执行echo $team_info[$team_cookie]以获取团队颜色。

更新：

如果您的要求是仅搜索单个团队的颜色，则可以使用简单的foreach循环并检查team_cookie与任何团队名称匹配，然后将其team_color分配给变量。

<?php
$team_color = "";
foreach($team_info as $each_team){
    if($each_team['team_name'] === $team_cookie){
        $team_color = $each_team['team_color'];
        break;
    }
}


echo $team_color;

但是，如果要搜索多个团队名称，则通过重组数组来执行上述操作。 您也可以将它们保留在会话中，以提高性能。

Answer 2

试试这个代码：

if(isset($_COOKIE['TEAM'])) {
    $team_cookie = $_COOKIE['TEAM'];
    $team_info=Array (

        '0' => Array (

                'team_name' => 'team1',
                'team_color' => 'red'
            ),

        '1' => Array (

                'team_name' => 'team2',
                'team_color' => 'blue'
            ),

        '2' => Array (

                'team_name' => 'team3',
                'team_color' => 'green'
            ),

        '3' => Array (

                'team_name' => 'team4',
                'team_color' => 'yellow'
        )
    );
    $color = ""; 
    foreach ($team_info as $team_info) {
       if($team_cookie == $team_info['team_name'] ) {
        // Do something  
        $color = $team_info['team_color'];
        break;
       }
    }
    echo $color;
}

Answer 3

检查以下代码，这将对您有所帮助。

if(isset($_COOKIE['TEAM'])){
    $team_cookie = $_COOKIE['TEAM'];
    $team_info=array (
        '0' => array (
                'team_name' => 'team1',
                'team_color' => 'red'
            ),
        '1' => array (

                'team_name' => 'team2',
                'team_color' => 'blue'
            ),
        '2' => array (

                'team_name' => 'team3',
                'team_color' => 'green'
            ),
        '3' => array(

                'team_name' => 'team4',
                'team_color' => 'yellow'
        )
    );
    $find = check_inarray($team_cookie,$team_info);
    if($find>0){
        //If found do some action
    }


    function check_inarray($team_cookie,$team_info){
        for($i=0;$i<count($team_info);$i++){
            if($team_info[$i]['team_name']==$team_cookie)        
                return true; 
        }
        return false;
    }
}