Question

假设我有一个包含这些值的数组：

$arr = [
     ['type' => 'gallery', 'value' => 'foo'],
     ['type' => 'gallery', 'value' => 'foo2'],
     ['type' => 'gallery', 'value' => 'foo3'],
     ['type' => 'featured', 'value' => 'test'],
];

我需要找到所有gallery个出现的地方，所以我做到了：

$key = array_search('gallery', array_column($arr, 'type'));
if($arr[$key] !== false)
{
   var_dump($arr[$key]);
}

但此打印仅出现一种情况：

['type'=>'图库'，'value'=>'foo3']，

Answer 1

<?php $arr = [
     ['type' => 'gallery', 'value' => 'foo'],
     ['type' => 'gallery', 'value' => 'foo2'],
     ['type' => 'gallery', 'value' => 'foo3'],
     ['type' => 'featured', 'value' => 'test'],
];



$new = array_filter($arr, function ($var) {
    return $var['type'] == 'gallery';
});
echo "<pre>";
print_r($new);

编辑：如果需要互换，则可以稍作修改：

$filterBy = 'gallery'; // or Finance etc.

$new = array_filter($arr, function ($var) use ($filterBy) {
    return ($var['type'] == $filterBy);
});

输出

Array
(
    [0] => Array
        (
            [type] => gallery
            [value] => foo
        )

    [1] => Array
        (
            [type] => gallery
            [value] => foo2
        )

    [2] => Array
        (
            [type] => gallery
            [value] => foo3
        )

)

Answer 2

这是一个基本的数组过滤问题。所提供的解决方案只是众多可能解决方案之一。

$arr = [
    ['type' => 'gallery', 'value' => 'foo'],
    ['type' => 'gallery', 'value' => 'foo2'],
    ['type' => 'gallery', 'value' => 'foo3'],
    ['type' => 'featured', 'value' => 'test'],
];

// filter out other types. make sure only 'gallery' types are returned to the new array $arrOnlyGallery.
// You can use a for loop too here.
$arrOnlyGallery = array_filter($arr, function($a) {
   return $a['type'] == 'gallery';
});

// show the array which should only contain 'gallery' types.
var_dump($arrOnlyGallery);

输出：

array（3）{[0] => array（2）{[“” type“] =>字符串（7）” gallery“ [” value“] => string（3）“ foo”} 1 => array（2）{[“ type”] => string（7）“ gallery” [“ value”] =>字符串（4）“ foo2”} [2] =>数组（2）{[“” type“] =>字符串（7） “ gallery” [“ value”] =>字符串（4）“ foo3”}}

您可以阅读有关PHP数组过滤here的更多信息。

Answer 3

尝试

function getGallery($var)
  {
  return($var['type'] == 'gallery');
  }

  $arr = [
     ['type' => 'gallery', 'value' => 'foo'],
     ['type' => 'gallery', 'value' => 'foo2'],
     ['type' => 'gallery', 'value' => 'foo3'],
     ['type' => 'featured', 'value' => 'test'],
  ];

$filteredArr = array_filter($arr,"getGallery");

Answer 4

您只需要简单地执行array_filter，它将得到预期的结果。

$searchResult =  array_filter($arr, function($v, $k) {
    return $v['type'] == "gallery";
}, ARRAY_FILTER_USE_BOTH);

print_r($searchResult);`

如何检索具有特定列值的数组列表？

4 个答案: