[英]Can't remove empty values from multi-dimensional array PHP
我的多维数组如下所示:
Array
(
[0] => Array
(
[0] => 2010-12-03
[1] => 0
[2] => Array
(
[0] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
[1] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
[2] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
[3] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
[4] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
[5] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
)
)
[1] => Array
(
[0] => 2010-12-10
[1] => 486
[2] => Array
(
[0] => Array
(
[0] => Bob
[1] => Lucy
[2] => 54
[3] => Y
[4] => PC1Clean
)
[1] => Array
(
[0] => Jo
[1] => Mary
[2] => 432
[3] => Y
[4] => PC2Bar
)
[2] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
[3] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
[4] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
[5] => Array
(
[0] =>
[1] =>
[2] => 0
[3] =>
[4] =>
)
)
)
我尝试过array_filter
和不同的循环迭代来删除zero
/ null
值,例如
function removeElementWithValue($array, $key, $value) {
foreach($array as $subKey => $subArray) {
if($subArray[$key] == $value) {
unset($array[$subKey]);
}
}
}
但是似乎没有任何作用。 任何帮助将非常感激!
您需要递归调用remove函数。 ( 为数组中的每个子值调用该函数,然后该函数将自动为每个子子值等调用自身,直到无法在树上深入为止 )。
这是一个快速制作(未经测试)的函数,该函数应删除所有空值(包括数组,如果它们为空):
function removeEmptyElements($array) {
foreach ($array as $key => $value){
if (empty($value)) {
unset($array[$key]);
} else if (is_array($value)) {
$array[$key] = removeEmptyElements($value);
}
}
return $array;
}
也许这个答案为时已晚,但是这里是:
$array = array( // array with examples
array('123',' 456', array(123, null)),
array('', null, '123'),
123,
234,
0,
null,
);
$filterEmptyValues = function($val) use (&$filterEmptyValues) {
foreach($val as $key => $value) {
if (!is_array($value)) {
if (!$value) unset($val[$key]);
}
else $val[$key] = call_user_func($filterEmptyValues, $value);
}
return $val;
};
$array = $filterEmptyValues($array) ;
print_r($array);
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