我不得不承认，理解表格对我来说是一个巨大的挑战，所以请不要对我太苛刻。。。
这是我的阵列：
Array
(
[names] => Array
(
[0] => Name1
[1] => Name2
[2] => Name1
)
[ids] => Array
(
[0] => 1
[1] => 2
[2] => 1
)
[quantities] => Array
(
[0] => 255
[1] => 2
[2] => 467
)
)
并且我希望求和"quantities"，其中names或ids是相同的。
示例输出应为：
Array
(
[names] => Array
(
[0] => Name1
[1] => Name2
)
[ids] => Array
(
[0] => 1
[1] => 2
)
[quantities] => Array
(
[0] => 722
[1] => 2
)
)
我知道有一个类似"array_reduce"的功能，但不知道如何使用
谢谢你的帮助！
尝试这个
$result = [];
foreach($array['ids'] as $key=>$val ){
if(array_key_exists($val, $result)){
$result[$val]['sum_quantity'] += $array['quantities'][$key];
}
else{
$result[$val]['sum_quantity'] = $array['quantities'][$key];
$result[$val]['name'] = $array['names'][$key];
$result[$val]['id'] = $array['ids'][$key];
}
}
输出将像这个
Array
(
[1] => Array //array key = id
(
['name'] => Name1,
['sum_quantity'] => 722,
['id'] => 1
)
[2] => Array
(
['name'] => Name2,
['sum_quantity'] => 2,
['id'] => 2
)
)
您可以这样做：
$testArray['names'][0]='name1';
$testArray['names'][1]='name2';
$testArray['names'][2]='name1';
$testArray['ids'][0]=1;
$testArray['ids'][1]=2;
$testArray['ids'][2]=1;
$testArray['quantities'][0]=255;
$testArray['quantities'][1]=2;
$testArray['quantities'][2]=467;
echo "<pre>";
print_r($testArray);
$unqArray['names']=array();
$unqArray['ids']=array();
$unqArray['quantities']=array();
foreach($testArray['ids'] as $key=>$value)
{
if(!in_array($value,$unqArray['ids']))
{
$unqArray['names'][]=$testArray['names'][$key];
$unqArray['ids'][]=$testArray['ids'][$key];
$quantity=0;
foreach($testArray['ids'] as $keyId=>$valueId)
{
if($valueId==$value)
{
$quantity+=$testArray['quantities'][$keyId];
}
}
$unqArray['quantities'][]=$quantity;
}
}
print_r($unqArray);
echo "</pre>";