给出这个数组:
array(40) {
[0]=>
array(10) {
["item"]=>
string(5) "AABBCC"
["quants"]=>
string(1) "1"
}
[1]=>
array(10) {
["item"]=>
string(5) "AABBCC"
["quants"]=>
string(1) "1"
}
[2]=>
array(10) {
["item"]=>
string(5) "SLF02"
["quants"]=>
string(1) "1"
}
[3]=>
array(10) {
["item"]=>
string(5) "SLF02"
["quants"]=>
string(1) "3"
}
}
如果不使用foreach,我最终会得到这个输出:
array(40) {
[0]=>
array(10) {
["item"]=>
string(5) "AABBCC"
["quants"]=>
string(1) "2"
}
[1]=>
array(10) {
["item"]=>
string(5) "SLF02"
["quants"]=>
string(1) "3"
}
}
是否有任何array_sum函数用这样的多维数组在php中执行此操作?
答案 0 :(得分:2)
这是一个糟糕的主意,但如果没有foreach,这似乎是一个有趣的挑战:
$arr =
[
[
"item" =>"AABBCC",
"quants" => "1",
],
[
"item" => "AABBCC",
"quants" => "1",
],
[
"item" => "SLF02",
"quants" => "1",
],
[
"item" => "SLF02",
"quants" => "3",
]
];
$arr = array_values(call_user_func_array("array_merge", array_map(function($i) use ($arr) {
return [$i["item"] => ["item" => $i["item"], "quants" => array_reduce(
array_filter($arr, function($j) use ($i) {
return $j["item"] == $i["item"];
}), function($carry, $item) {
return $carry + $item["quants"];
})
]];
}, $arr)));
var_dump($arr);
/*
array(2) {
[0]=>
array(2) {
["item"]=>
string(6) "AABBCC"
["quants"]=>
int(2)
}
[1]=>
array(2) {
["item"]=>
string(5) "SLF02"
["quants"]=>
int(4)
}
}
*/
答案 1 :(得分:1)
这是我的方法:
<?php
$array = array(
array('item'=>'AABBCC','quants'=>1),
array('item'=>'AABBCC','quants'=>1),
array('item'=>'SLF02','quants'=>1),
array('item'=>'SLF02','quants'=>3),
);
$summed_array = array();
foreach($array as $row){
$key = $row['item'];
if(!isset($summed_array[$key])){
$summed_array[$key] = array(
'item' => $row['item'],
'quants' => 0
);
}
$summed_array[$key]['quants'] += $row['quants'];
}
// turn the array back to a 0 based array
$summed_array = array_values($summed_array);
echo '<pre>',print_r($summed_array),'</pre>';