php 在多维数组上使用 array_intersect
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Using array_intersect on a multi-dimensional array
提问by Nathan
I have two arrays that both look like this:
我有两个数组，它们看起来都像这样：
Array
(
[0] => Array
(
[name] => STRING
[value] => STRING
)
[1] => Array
(
[name] => STRING
[value] => STRING
)
[2] => Array
(
[name] => STRING
[value] => STRING
)
)
and I would like to be able to replicate array_intersect by comparing the ID of the sub arrays within the two master arrays. So far, I haven't been successful in my attempts. :(
我希望能够通过比较两个主阵列中子阵列的 ID 来复制 array_intersect。到目前为止，我的尝试还没有成功。:(
回答by Wiseguy
Use array_uintersect()to use a custom comparison function, like this:
使用array_uintersect()使用自定义的比较函数，就像这样：
$arr1 = array(
array('name' => 'asdfjkl;', 'value' => 'foo'),
array('name' => 'qwerty', 'value' => 'bar'),
array('name' => 'uiop', 'value' => 'baz'),
);
$arr2 = array(
array('name' => 'zxcv', 'value' => 'stuff'),
array('name' => 'asdfjkl;', 'value' => 'foo'),
array('name' => '12345', 'value' => 'junk'),
array('name' => 'uiop', 'value' => 'baz'),
);
$intersect = array_uintersect($arr1, $arr2, 'compareDeepValue');
print_r($intersect);
function compareDeepValue($val1, $val2)
{
return strcmp($val1['value'], $val2['value']);
}
which yields, as you would hope:
正如您所希望的那样，它会产生：
Array
(
[0] => Array
(
[name] => asdfjkl;
[value] => foo
)
[2] => Array
(
[name] => uiop
[value] => baz
)
)
回答by ScreamZ
function compareDeepValue($val1, $val2)
{
return strcmp($val1['value'], $val2['value']);
}
Be sure that val2 key is existing in val1 array, because the function is ordering array first. Very strange.
确保 val2 键存在于 val1 数组中，因为该函数首先对数组进行排序。很奇怪。
回答by rüff0
you can use embedded function with array_uintersect php function. ex:
您可以将嵌入式函数与 array_uintersect php 函数一起使用。前任：
$intersectNames = array_uintersect($arr1, $arr2, function ($val1, $val2){
return strcmp($val1['name'], $val2['name']);
});
$intersectValues = array_uintersect($arr1, $arr2, function ($val1, $val2){
return strcmp($val1['value'], $val2['value']);
});
print_r('namesIntersected' => $intersectNames, 'valuesIntersected' => $intersectValues)
