如何通过传递另一个数组元素来获取数组元素？

Question

我有一个数组跟随

[0] => Array
 (
    [month] => Oct
    [amount] => 1200.00
 )

如何通过[amount]

获取[month]

Answer 1

你没有。两个选项：

1. 循环：

   foreach ($array as $i) {
        if ($i['month'] == 'Oct') {
            echo $i['amount'];
        }
   }
   

2. 按月索引数据：

   $array = array_combine(array_map(function($i) { return $i['month']; }, $array),
                          $array);
   echo $array['Oct']['amount'];
   

Answer 2

foreach ($arr as $k => $v) {
    if ($v['month'] == $needleMonth) {
        echo $v['amount'] . ' - that`s it';
        break;
    }
}

Answer 3

你必须循环你的数组并每次测试你想要的月份== $ arrayElement [$ i] ['month']

Answer 4

foreach ($arr as $k=>$v) {
    if ($v['month']=='Oct') {
        echo $v['amount'];
    }
}

Answer 5

$selectedMonth = 'Oct';

foreach($yourArray as $child){

    if($child['month'] == $selectedMonth){
        echo $child['amount'];
    }

}