[英]How to search a multi-dimensional array by multiple values at once in PHP?
Given the following 2D array:给定以下二维数组:
$data_info_array = array(
array(
'score' => '100',
'name' => 'Alice',
'subject' => 'Data Structures'
),
array(
'score' => '50',
'name' => 'Bob',
'subject' => 'Advanced Algorithms'
),
array(
'score' => '75',
'name' => 'Charlie',
'subject' => 'Distributed Computing'
)
);
// this gets the key when I search for the score of 50 from one column
$index = array_search('50', array_column($data_info_array, 'score'));
echo $index;
If I want to search by two values I can only think of something like:如果我想按两个值进行搜索,我只能想到以下内容:
$index1 = array_search('50', array_column($data_info_array, 'score'));
$index2 = array_search('Bob', array_column($data_info_array, 'name'));
$real_index = ( $index1 === $index2 ) ? $index1 : null;
Is there a way I can search for score of '50' and name of 'Bob' together and get the index to that only if that combo exists?有没有办法我可以一起搜索“50”的分数和“鲍勃”的名字,并且只有当该组合存在时才能获得索引? Is there a better way do do than what I've come up with?
有没有比我想出的更好的方法呢?
You can build your search query as an array and compare the intersection of each item with it.您可以将搜索查询构建为一个数组,并将每个项目与其的交集进行比较。
$search = ['score' => '50', 'name' => 'Bob'];
foreach($data_info_array as $k => $v) {
if ( $search === array_intersect($v, $search) ) {
echo $k;
break;
}
}
@mickmackusa noticed it is safer to use array_intersect_assoc()
here. @mickmackusa 注意到在这里使用
array_intersect_assoc()
更安全。 He's right because when the multi-dimensional array items are unpredictable, nothing forbids to have items like that:他是对的,因为当多维数组项不可预测时,没有什么禁止这样的项:
['miaou' => '50', 'graou' => 'Bob', 'score' => '50', 'name' => 'Bob']
where the searched values are also present but for other keys.除了其他键之外,搜索值也存在。 In this case
array_intersect()
returns all correct values (with their corresponding keys of course) regardless the keys in $search
, and the comparison with the search array will return false
.在这种情况下,
array_intersect()
返回所有正确的值(当然还有它们对应的键),而不管$search
的键是什么,并且与搜索数组的比较将返回false
。
But using array_intersect_assoc()
, you ensure that only values for keys in $search
are taken in account.但是使用
array_intersect_assoc()
,您可以确保只考虑$search
中键的值。
Conclusion: If you let yourself be lulled into sleep by the seeming monotony of multidimensional array items, you won't be immune to surprise when unexpected variations arise.结论:如果你让自己通过多维数组的项目看似单调地哄骗进入睡眠,你将不会被免疫的惊喜时,意想不到的变化所引起的。
You can use array_filter()
, which allows you to do as many checks on the contents as you need at the same time...您可以使用
array_filter()
,它允许您同时根据需要对内容进行尽可能多的检查...
$output = array_filter($data_info_array, function ($data) {
return $data['score'] == 50 && $data['name'] == 'Bob';
});
This will give you a list of the matches, so you may need to do [0]
(and check if only 1 is returned) if you need a single match.这将为您提供匹配列表,因此如果您需要单个匹配,您可能需要执行
[0]
(并检查是否仅返回 1)。
Here is a nice one-liner, utilizing PHP arrow functions这是一个很好的单行代码,利用 PHP 箭头函数
$name = "Alice";
$score = "100";
$result = array_filter($data_info_array, fn($data) => $data['name'] == $name && $data['score'] == $score );
print_r($result);
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