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php - 如何检查数组的元素是否存在于另一个数组数组中

问题描述

$result = array();
    $A= Array
   (
    [0] => Array
       (
        [id] => 1946
        [name] => cook
        [pic] => cookpic.png
       )

)
$B =  Array
 (
   [0] => Array
    (
        [id] => 1944
        [name] => driver
        [pic] => driver.png

    )

  [1] => Array
    (
        [id] => 934
        [name] => developer
        [pic] => developer.jpg
    )

[2] => Array
    (
        [id] => 1946
        [name] => cook
        [pic] => cookpic.png

    )

 )

我试过的：

   $result = !empty(array_intersect($a, $b));

我有两个数组，我用来var_dump展示它们并且可以在上面看到它们。

我想要实现的是，我想比较两个职业并想要$result独一无二的数组。现在，如果 Cook 不存在于 $B 中，那么 Cook 应该被推送到$B数组中，这将变成$resultelse 它不应该被推送。

标签： phparraysmultidimensional-arrayphp-7

解决方案

做$result = !empty(array_intersect($a, $b));只会告诉你$a和之间是否有共同的元素$b

$result = array();
$a = array(
    array(
        "id" => 1946,
        "name" => "Cook", // upper case C
        "pic" => "cookpic.png"
    ),

    array(
        "id" => 1946,
        "name" => "cook", // lower case c
        "pic" => "cookpic.png"
    )
);

$b = array(
    array(
        "id" => 1944,
        "name" => "driver",
        "pic" => "driver.png"
    ),
    array(
        "id" => 934,
        "name" => "developer",
        "pic" => "developer.png"
    ),
    array(
        "id" => 1946,
        "name" => "cook", // lower case c
        "pic" => "cookpic.png"
    )
);

foreach ($a as $k => $v) {
    if (in_array($v, $b) == false) {
        array_push($result, $v);
    }
}

print_r($result);

您可以使用array_diff但它不适用于多维数组。所以你必须从头开始

编辑：

$result = array();
$a = array(
    array(
        "id" => 1946,
        "name" => "Cook", // upper case C
        "pic" => "cookpic.png"
    ),

    array(
        "id" => 1946,
        "name" => "cook", // lower case c
        "pic" => "cookpic.png"
    )
);

$b = array(
    array(
        "id" => 1944,
        "name" => "driver",
        "pic" => "driver.png"
    ),
    array(
        "id" => 934,
        "name" => "developer",
        "pic" => "developer.png"
    ),
    array(
        "id" => 1946,
        "name" => "cook", // lower case c
        "pic" => "cookpic.png"
    )
);

$m = array_merge($a, $b);
$result = array_map("unserialize", array_unique(array_map("serialize", $m)));
print_r($result);

合并两个数组，然后使用 array_map 应用 array_unique 删除重复项

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