2017-04-11 114 views
-1

结合我有一个数组如下如何数组具有相同索引

[{"2":[2]},{"9":[4,10,11,12,13,14,15,16,17,19,20,21,22,23,24,25,26,27,28,30,32,33,34,36,41]},{"2":[5,6,9]},{"7":[7,8]},{"9":[3]}] 

是那里的值相同的索引合并任何可能的方式?

+0

您的阵列具有相同的密钥,但差异值,比如说第一物镜键:2 = 2,但后来它的[5,6,9] ,,显示我们想以什么格式结尾.. –

回答

2

是的,这是可能的解码JSON字符串并且使用array_reduce:

$arr = json_decode('[{"2":[2]},{"9":[4,10,11,12,13,14,15,16,17,19,20,21,22,23,24,25,26,27,28,30,32,33,34,36,41]},{"2":[5,6,9]},{"7":[7,8]},{"9":[3]}]'); 

$arr = array_reduce($arr, function ($carry, $item) { 
    $key = key($item); 

    if (isset($carry[$key])) { 
     $carry[$key]->$key = array_merge($carry[$key]->$key, $item->$key); 
    } else { 
     $carry[$key] = $item; 
    } 

    return $carry; 
}); 

echo json_encode(array_values($arr)); 

结果是:

[{ “2”:[2,5,6,9]} ,{ “9”:[4,10,11,12,13,14,15,16,17,19,20,21,22,23,24,25,26,27,28,30,32,33 ,34,36,41,3]},{ “7”:[7,8]}]

+0

array_merge():参数#1不是数组,我试过你的解决方案,但我的数组不是字符串..它是一个数组, – CodeGG

+0

@ Matei-Mihai:如果我可以比如说,你甚至可以在第7行执行'sort($ carry [$ key] - > $ key,SORT_NUMERIC);并且按照@ Beshoy-Girgis的方式获得数组:#^^ – OldPadawan

+0

我自己做错了,您的解决方案正常工作。感谢matei !! – CodeGG

0
<?php 
$json = '[{"2":[2]},{"9":[4,10,11,12,13,14,15,16,17,19,20,21,22,23,24,25,26,27,28,30,32,33,34,36,41]},{"2":[5,6,9]},{"7":[7,8]},{"9":[3]}]'; 
$multi_array = json_decode($json, true); 
$result = []; 
foreach($multi_array as $arr) 
{   
    foreach($arr as $k => $v) 
    { 
     $temp = isset($result[$k]) ? $result[$k] : []; 
     $result[$k] = array_merge($temp, $v); 
    } 
} 
print_r($result); 
0

这是另一种选项:

$old = json_decode('[{"2":[2]},{"9":[4,10,11,12,13,14,15,16,17,19,20,21,22,23,24,25,26,27,28,30,32,33,34,36,41]},{"2":[5,6,9]},{"7":[7,8]},{"9":[3]}]', true); 

$new = []; 
array_map(function ($arr) use (&$new) { 
    $key = key($arr); 

    $new[$key] = array_merge(current($arr), !empty($new[$key]) ? $new[$key] : []); 
}, $old); 

echo json_encode($new); 

输出:

{"2":[5,6,9,2],"9":[3,4,10,11,12,13,14,15,16,17,19,20,21,22,23,24,25,26,27,28,30,32,33,34,36,41],"7":[7,8]} 
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