按给定值返回数组键(给定月份返回日期)

Question

我有一个PHP多维数组，其中有一个键，数组下有日期。

Array (
    [123] => Array
    (
       [one] => 2016-01-22 10:32:15
       [two] => 2016-02-21 14:24:15
       [three] => 2016-02-12 11:00:15
    )
    [553] => Array
    (
       [one] => 2016-03-22 10:32:15
       [two] => 2016-02-21 14:24:15
       [three] => 2016-08-12 11:00:15
    )
)

我需要在给定的月份得到密钥。例子:

$value = '2016-02';
return 123 -> 2
return 552 -> 1

实现这一目标的最佳方法是什么?谢谢你。

Answer 1

你可以像下面这样做:-

<?php
$array = Array (
    '123' => Array
    (
       'one' => '2016-01-22 10:32:15',
       'two' => '2016-02-21 14:24:15',
       'three' => '2016-02-12 11:00:15'
    ),
    '553' => Array
    (
       'one' => '2016-03-22 10:32:15',
       'two' => '2016-02-21 14:24:15',
       'three' => '2016-08-12 11:00:15'
    )
);
$value = '2016-02';
$final_data = array();
foreach ($array as $key=> $arr){
  foreach($arr as $key1=>$val){
    if(strpos($val,$value)!==false){
       $final_data[$key][]=$key1;
    }
  }
}
echo "<pre/>";print_r($final_data);

输出:https://eval.in/627935

或者这个也很有用:-

https://eval.in/627936

Answer 2

您可以简单地如下所示。我稍微改了一下代码

<?php
$date = Array (
123 => Array
(
   "2016-01-22 10:32:15",
   "2016-02-21 14:24:15",
   "2016-02-12 11:00:15"
),
553 => Array
(
   "2016-03-22 10:32:15",
   "2016-02-21 14:24:15",
   "2016-08-12 11:00:15"
)
);
$givenDate = "2016-02";
$givenMonth = explode("-",$givenDate)[1];
foreach ($date as $key => $value){
    foreach ($value as $k => $v){
        $d = explode(" ", $v);
        $d = explode("-", $d[0]);
        if($d[1] ==$givenMonth ){
            echo $key."=>".$k."<br/>";
        }
    }
}