php检查数组是否以特定的值开始并以特定的值结束,

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
    }
}

<?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

你可以结合使用 array_column 和 array_filter 你呢? end 从数组返回最后一项 $result :

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

那会给你:

string(1) "0"

然后你可以像这样使用它:

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