Laravel - 从多维数组中删除具有 NULL 值的元素
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Laravel - Remove elements having NULL value from multidimentional array
提问by Dev
I am using Laravel 5.3.
我正在使用Laravel 5.3.
I have a multidimensional arraylike:
我有一个multidimensional array喜欢：
Array
(
[id] => 37141
[last_done_on] => []
[children] => Array
(
[0] => NULL /* This must be removed */
[1] => Array
(
[id] => 37142
[last_done_on] => Array()
[children] => Array()
)
[2] => Array
(
[id] => 37143
[last_done_on] => Array()
[children] => Array
(
[0] => Array
(
[id] => 37144
[last_done_on] => Array()
[children] => Array()
)
[1] => Array
(
[id] => 37145
[last_done_on] => Array()
[children] => Array()
)
)
)
[3] => Array
(
[id] => 37157
[last_done_on] => Array()
[children] => Array
(
[0] => Array
(
[id] => 37158
[last_done_on] => Array()
[children] => Array()
)
[1] => Array
(
[id] => 37159
[last_done_on] => Array()
[children] => Array
(
[0] => NULL /* This must be removed */
)
)
)
)
)
)
And I want to removethe elementsthat are NULL. So the result should be like:
而我想remove的elements是NULL。所以结果应该是这样的：
Array
(
[id] => 37141
[last_done_on] => []
[children] => Array
(
[0] => Array
(
[id] => 37142
[last_done_on] => Array()
[children] => Array()
)
[1] => Array
(
[id] => 37143
[last_done_on] => Array()
[children] => Array
(
[0] => Array
(
[id] => 37144
[last_done_on] => Array()
[children] => Array()
)
[1] => Array
(
[id] => 37145
[last_done_on] => Array()
[children] => Array()
)
)
)
[2] => Array
(
[id] => 37157
[last_done_on] => Array()
[children] => Array
(
[0] => Array
(
[id] => 37158
[last_done_on] => Array()
[children] => Array()
)
[1] => Array
(
[id] => 37159
[last_done_on] => Array()
[children] => Array
(
)
)
)
)
)
)
How to do this?
这该怎么做？
采纳答案by Rwd
If you want to remove the nullvalues but not the empty arrays you could do something like:
如果您想删除null值而不是空数组，您可以执行以下操作：
function array_remove_null($item)
{
if (!is_array($item)) {
return $item;
}
return collect($item)
->reject(function ($item) {
return is_null($item);
})
->flatMap(function ($item, $key) {
return is_numeric($key)
? [array_remove_null($item)]
: [$key => array_remove_null($item)];
})
->toArray();
}
$newArray = array_remove_null($array);
Hope this helps!
希望这可以帮助！
回答by Ganesh K
In collection, use filter
在集合中，使用过滤器
some_collection->filter(function($value, $key) {
return $value != null;
});
回答by Onix
Give it a try:
试一试：
$yourArr= array_map('array_filter', $yourArr);
$yourArr= array_filter( $yourArr);
回答by dparoli
Try this:
尝试这个：
function array_filter_recursive($input)
{
foreach ($input as &$value)
{
if (is_array($value))
{
$value = array_filter_recursive($value);
}
}
return array_filter($input, function($var){return !is_null($var);} );
}
