如何检查数组元素是否存在于另一个数组数组中

Question

$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

    )

 )

What I have tried:

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

I have two array, I used var_dump to show them and can see them above.

What I am trying to achieve is, I want to compare two professions and want $result array which will be unique. Now if Cook is not present in $B then cook should get pushed in $B array and this will become $result else it should not get pushed.

Answer 1

doing $result = !empty(array_intersect($a, $b)); will just tell you if there is common elements between $a and $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);

you could use array_diff but it doesn't work with multi dimentionnal arrays. So you have to do it from scratch

EDIT:

$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);

merge the two arrays and then apply array_unique using array_map the delete duplicates