我有一個(gè)這樣的二維數(shù)組：$input = array( "Category 1" => array( "Name 1" => array( "value" => 1, // ... other keys, doesn't matter ), "Name 2" => array( "value" => 0, ), "Name 3" => array( "value" => 0, ), ), "Category 2" => array( "Name 1" => array( "value" => 8, ), "Name 2" => array( "value" => 0, ), "Name 3" => array( "value" => 12, ), ),);請(qǐng)注意，每個(gè)Category N都有相同的Name N鍵，只有value變化。我想過(guò)濾掉value=0每個(gè)維度中的條目，例如：$ouput = array( "Category 1" => array( "Name 1" => array( "value" => 1, // ... other keys, doesn't matter ), "Name 3" => array( "value" => 0, ), ), "Category 2" => array( "Name 1" => array( "value" => 8, ), "Name 3" => array( "value" => 12, ), ),);Name 1 仍然是由于 value!=0 兩者Category NName 2由于 兩者中的value=0而被過(guò)濾掉Category NName 3 仍然是由于值= 12 inCategory 2我的第一個(gè)想法是使用array_intersect()。但由于$input是動(dòng)態(tài)的，我不知道它有多少維度（也不知道它們的名字）。也許我們可以將一個(gè)多維數(shù)組分解為每個(gè)維度的數(shù)組？我不確定這是最好的方法。每一個(gè)提示都值得贊賞。
2 回答
慕蓋茨4494581
TA貢獻(xiàn)1850條經(jīng)驗(yàn) 獲得超11個(gè)贊
我認(rèn)為這可以完成工作。基本上遍歷第一個(gè)類(lèi)別（因?yàn)樗鼈兌季哂邢嗤?Name 值）并提取每個(gè)特定 Name N 值的所有字段。如果這些值的總和為 0（如果您可能有負(fù)數(shù)，還有其他類(lèi)似的方法），則刪除所有這些字段...
foreach ( current($input) as $name => $value ) {
// Extract all values
$nameValues = array_column(array_column($input, $name), "value");
if ( array_sum($nameValues) == 0 ) {
// remove values (use & to allow to modify values)
foreach ( $input as &$categories ) {
unset ($categories[$name]);
}
}
}
print_r($input);
回首憶惘然
TA貢獻(xiàn)1847條經(jīng)驗(yàn) 獲得超11個(gè)贊
使用遞歸函數(shù)瀏覽您的數(shù)組。
function Clean($input){
if (is_array($input)){
foreach($input as $key=>$value){
$output=Clean($value);
if ($output===null){
return 0;
}elseif($output==0){
unset($input[$key]);
}else{
$input[$key]=$output;
}
}
return $input;
}else{
if ($input==0){
return null;
}else{
return $input;
}
}
}
例子：
<?php
function Clean($input){
if (is_array($input)){
foreach($input as $key=>$value){
$output=Clean($value);
if ($output===null){
return 0;
}elseif($output==0){
unset($input[$key]);
}else{
$input[$key]=$output;
}
}
return $input;
}else{
if ($input==0){
return null;
}else{
return $input;
}
}
}
$input = array(
"Category 1" => array(
"Name 1" => array(
"value" => 1,
// ... other keys, doesn't matter
),
"Name 2" => array(
"value" => 0,
),
"Name 3" => array(
"value" => 0,
),
),
"Category 2" => array(
"Name 1" => array(
"value" => 8,
),
"Name 2" => array(
"value" => 0,
),
"Name 3" => array(
"value" => 12,
),
),
);
echo "input:";
var_dump($input);
$output=Clean($input);
echo "output:";
var_dump($output);
//exit;
$input = array(
"Name 1" => array(
"value" => 1,
// ... other keys, doesn't matter
),
"Name 2" => array(
"value" => 0,
),
"Name 3" => array(
"value" => 0,
)
);
echo "input:";
var_dump($input);
$output=Clean($input);
echo "output:";
var_dump($output);
$input = array(
"Category A" => array(
"Cat B" => array(
"Name 1" => array(
"value" => 1,
// ... other keys, doesn't matter
),
"Name 2" => array(
"value" => 0,
),
"Name 3" => array(
"value" => 0,
)
)
)
);
echo "input:";
var_dump($input);
$output=Clean($input);
echo "output:";
var_dump($output);
?>
結(jié)果：
input:array(2) {
["Category 1"]=>
array(3) {
["Name 1"]=>
array(1) {
["value"]=>
int(1)
}
["Name 2"]=>
array(1) {
["value"]=>
int(0)
}
["Name 3"]=>
array(1) {
["value"]=>
int(0)
}
}
["Category 2"]=>
array(3) {
["Name 1"]=>
array(1) {
["value"]=>
int(8)
}
["Name 2"]=>
array(1) {
["value"]=>
int(0)
}
["Name 3"]=>
array(1) {
["value"]=>
int(12)
}
}
}
output:array(2) {
["Category 1"]=>
array(1) {
["Name 1"]=>
array(1) {
["value"]=>
int(1)
}
}
["Category 2"]=>
array(2) {
["Name 1"]=>
array(1) {
["value"]=>
int(8)
}
["Name 3"]=>
array(1) {
["value"]=>
int(12)
}
}
}
input:array(3) {
["Name 1"]=>
array(1) {
["value"]=>
int(1)
}
["Name 2"]=>
array(1) {
["value"]=>
int(0)
}
["Name 3"]=>
array(1) {
["value"]=>
int(0)
}
}
output:array(1) {
["Name 1"]=>
array(1) {
["value"]=>
int(1)
}
}
input:array(1) {
["Category A"]=>
array(1) {
["Cat B"]=>
array(3) {
["Name 1"]=>
array(1) {
["value"]=>
int(1)
}
["Name 2"]=>
array(1) {
["value"]=>
int(0)
}
["Name 3"]=>
array(1) {
["value"]=>
int(0)
}
}
}
}
output:array(1) {
["Category A"]=>
array(1) {
["Cat B"]=>
array(1) {
["Name 1"]=>
array(1) {
["value"]=>
int(1)
}
}
}
}
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