Question

是否有一种干净优雅的方法来检查具有特定值的数组对象值＆＃34; positionID = string（29）＆＃34;如果它的＆＃34;行动＆＃34;从例如＆＃34;（字符串）1＆＃34开始;并以＆＃34;（字符串）0＆＃34;结束。

unlooped数组看起来类似于

array (
   [0] => Object1 {
            ['PositionID'] => (string) 29
            ['Action'] => (string) 1
          }
   [1] => Object22 {
            ['PositionID'] => (string) 30
            ['Action'] => (string) 0
          }
   [2] => Object23 {
            ['PositionID'] => (string) 29
            ['Action'] => (string) 1
          }

   [3] => Object5 {
            ['PositionID'] => (string) 31
            ['Action'] => (string) 0
          }
   [2] => Object23 {
            ['PositionID'] => (string) 29
            ['Action'] => (string) 0
          }
);

我想在那个数组中找出最后一个＆＃34; Action＆＃34;出现＆＃34; positionID = 29＆＃34;是0或其他。目前我正在将positionId分组并将它们存储到第三个数组并循环它，这对我来说就像一个肮脏的解决方案。

Answer 1

看看end()。第一项应该是显而易见的。

$first = $array[0];
if ($first->positionId === '29' && $first->Action === '1') {
    $last = end($array);
    if ($last->positionId === '29' && $last->Action === '0' {
        // Stuff
    }
}

Answer 2

<?php

$items = 
[
    [
        'position' => '17',
        'action' => '1'
    ],
    [
        'position' => '47',
        'action' => '0'
    ],
    [
        'position' => '23',
        'action' => '0'
    ]
];

foreach ($items as $k => $item)
    $items[$k] = (object) $item;

var_dump($items);

if(array_column($items, 'action', 'position')[23] === '0')
    echo "Action is '0' for the object with position 23";

输出：

array(3) {
    [0]=>
    object(stdClass)#1 (2) {
      ["position"]=>
      string(2) "17"
      ["action"]=>
      string(1) "1"
    }
    [1]=>
    object(stdClass)#2 (2) {
      ["position"]=>
      string(2) "47"
      ["action"]=>
      string(1) "0"
    }
    [2]=>
    object(stdClass)#3 (2) {
      ["position"]=>
      string(2) "23"
      ["action"]=>
      string(1) "0"
    }
  }
  Action is '0' for the object with position 23

Answer 3

您可以使用array_column和array_filter以及end的组合来返回数组$result中的最后一项：

$result = array_column(array_filter($arrays, function ($x) {
    return $x->PositionID === '29';
}), 'Action');
$lastValue = end($result);
var_dump($lastValue);

那会给你：

string(1) "0"

然后你可以使用它：

if ($lastValue === "0") {
    // ...
}

PHP检查数组是否以特定值开头并以特定值结束，

3 个答案: