我有 2 个数组,想将它们合并在一起,并且在第二个数组中找不到该项目,请插入一个具有空值的键。基本上,在数组2中添加数组1中的项目,匹配2个array1子键;Array2 不必与数组 1 的长度相同,其长度较小。
阵列1
[0][item] = 'aaaa'
[type] = '1234'
[1][item] = 'aaaa'
[type] = '6789'
[2][item] = 'bbbb'
[type] = '1234'
[3][item] = 'bbbb'
[type] = '6789'
和数组 2:
[0][item] = 'aaaa'
[type] = '1234'
[feature] = 'www'
[1][item] = 'aaaa'
[type] = '6789'
[feature] = 'www'
结果:
[0][item] = 'aaaa'
[type] = '1234'
[feature] = 'www'
[1][item] = 'aaaa'
[type] = '6789'
[feature] = 'www'
[2][item] = 'bbbb'
[type] = '1234'
[feature] = ''
[3][item] = 'bbbb'
[type] = '6789'
[feature] = ''
我尝试了在这里找到的几个建议,它们都归结为一个 dimesnional 数组或匹配索引。有什么建议吗?
让 PHP 通过数组键为您进行匹配:
$result=array();
foreach ($array1 as $item) {
$item['feature']='';
$result[$item['item'].'-'.$item['type']]=$item;
}
foreach ($array2 as $item) {
$result[$item['item'].'-'.$item['type']]['feature']=$item['feature'];
}
$result=array_values($result);
你试过这样的事情吗?
foreach ($array1 as $key=>$value){
if (isset($array2[$key]['feature'])){
$array1[$key]['feature'] = $array2[$key]['feature'];
} else {
$array1[$key]['feature'] = '';
}
}
你不需要'feature'的空字符串,在将来的迭代中,你可以用isset检查它。保持简单,不要创建不需要或难以维护的结构。这将适用于 n 个子项,无需维护。
$ar1 = array(
array('item' => 'aaaa', 'type' => '1234'),
array('item' => 'aaaa', 'type' => '6789'),
array('item' => 'bbbb', 'type' => '1234'),
array('item' => 'bbbb', 'type' => '6789')
);
$ar2 = array(
array('item' => 'aaaa', 'type' => '1234','feature' => 'www'),
array('item' => 'aaaa', 'type' => '6789','feature' => 'www')
);
for ($i = 0;$i<count($ar1);$i++) {
if (array_key_exists($i, $ar2)){
$result[] = array_merge($ar2[$i], $ar1[$i]);
} else {
$result[] = $ar1[$i];
}
}
// result
Array
(
[0] => Array
(
[item] => aaaa
[type] => 1234
[feature] => www
)
[1] => Array
(
[item] => aaaa
[type] => 6789
[feature] => www
)
[2] => Array
(
[item] => bbbb
[type] => 1234
)
[3] => Array
(
[item] => bbbb
[type] => 6789
)
)
你可以使用这样的东西:
array_walk($array, function ($arr, $key) use ($array2) {
if (array_key_exists($key, $array2) && is_array($array2[$key])) {
$arr = array_merge($arr, $array2[$key]);
}
});
print_r($array); // Will have all missed keys from $array2