php - 比较两个数组，如果索引相同，则删除它

Question

如何通过将数组索引与另一个数组索引进行比较来删除它？

PHP：

    $results = array ( array(
            "Name" => $NameUser, 
            "Surname" => $SurnameUser, 
            "MyComment" => $MyComment,
            "VideoPath" => $VideoPath,
            "Reg_Date" => $Reg_Date, 
            "ThumbPath" => $ThumbPath, 
            "UserId" => $UserId
            ));  
    print_r($results[0]); // Array ( [Name] => aaa [Surname] => aaa [MyComment] => aaa [VideoPath] => aaa [Reg_Date] => aaa [ThumbPath] => aaa [UserId] => aaa)

$JSON_List = file_get_contents('test.json');
$arr = json_decode($JSON_List);
print_r($arr[0]); // stdClass Object ( [Name] => aaa [Surname] => aaa [MyComment] => aaa [VideoPath] => aaa [Reg_Date] => aaa [ThumbPath] => aaa [UserId] => aaa )

我可以看到这两个索引是相同的，我正在使用 for 循环，但它寻求 php 没有将它们视为相同。

如何正确比较数组，如果相同则从列表中删除相同的数组索引？

PHP：

foreach ($arr as $index)  {

    $countIndex++;

    print_r($countIndex);

    if ($arr[$countIndex - 1] == $results[0]) {

        print_r("array is identical \n");
    }else{

        print_r("array is not identical \n");
    }

}

Answer 1

检查两个单独数组中是否存在两个键的简单方法是使用array_intersect_key() 函数。

$sameKeys = array_intersect_key($arr1, $arr2);

Answer 2

有 2 个数组：

$results = array ( array(
        "Name" => '$NameUser', 
        "Surname" => '$SurnameUser', 
        "MyComment" => '$MyComment',
        "VideoPath" => '$VideoPath',
        "Reg_Date" => '$Reg_Date', 
        "ThumbPath" => '$ThumbPath', 
        "UserId" => '$UserId'
    )
);  
// print_r($results[0]); 
//$JSON_List = file_get_contents('test.json');
//$arr = json_decode($JSON_List);
$arr = array(array(//simulate
        "Name" => '$NameUser', 
        "Surname" => '$SurnameUser', 
        "MyComment" => '$MyComment',
        "VideoPath" => '$VideoPath',
        "Reg_Date" => '$Reg_Date', 
        "ThumbPath" => '$ThumbPath', 
        "UserId" => '$UserId'
    ),
    array(
        "Name" => '$NameUser2', 
        "Surname" => '$SurnameUser2', 
        "MyComment" => '$MyComment2',
        "VideoPath" => '$VideoPath2',
        "Reg_Date" => '$Reg_Date2', 
        "ThumbPath" => '$ThumbPath', 
        "UserId" => '$UserId2'
));

//Search identicals
function search_identicals(&$arr,$results){
    $response = array();
    foreach($results as $k=>$value){
        array_walk($arr,function($elem,$key)use($value,&$response,&$arr){
            $resp = array_diff($elem,$value);
            if(empty($resp)){
                unset($arr[$key]);
                array_push($response,$elem);
            }
        });
    }
    return ($response) ? $response : false;
}

$identicals = search_identicals($arr,$results);
var_dump('to delete');
var_dump($identicals);
var_dump('deleted');
var_dump($arr);

//你只需要这个：

function search_identicals(&$arr,$results){//&$arr by reference
    foreach($results as $k=>$value){
        array_walk($arr,function($elem,$key)use($value,&$arr){
            $resp = array_diff($elem,$value);//if is identical, return empty
            if(empty($resp)){
                unset($arr[$key]);//remove repeated
            }
        });
    }
}

Answer 3

你可以使用这个：array_unique( array_merge($arr1, $arr2) );

或者这个：

$arr_1 = array_diff($arr1, $arr2);
$arr_2 = array_diff($arr2, $arr1);