我有一個包含數組的多維數組，每個數組都包含一個artisan和closeness鍵。我想合并多個數組（如果相同）artisans到一個數組，它是從中合并的數組closeness的值的總和。closeness也就是說，這個數組：Array( [0] => Array ( [artisan] => carpenter [closeness] => 0.8 ) [1] => Array ( [artisan] => brick layer [closeness] => 0.4 ) [2] => Array ( [artisan] => electrician [closeness] => 0.9 ) [3] => Array ( [artisan] => carpenter [closeness] => 0.8 [is_real] => 1 ) [4] => Array ( [artisan] => brick layer [closeness] => 0.9 [is_real] => 1 ))應該變成：Array( [0] => Array ( [artisan] => carpenter [closeness] => 1.6 //0.8+0.8 ) [1] => Array ( [artisan] => brick layer [closeness] => 1.3 //0.4+0.9 ) [2] => Array ( [artisan] => electrician [closeness] => 0.9 //remains 0.9 because it is the only array with artisan value of electrician )
2 回答
慕仙森
TA貢獻1827條經驗 獲得超8個贊
試試這個循環
//create new array to hold values in the format you need
$new_array = [];
//loop through old array
foreach($old_array as $arr) {
$artisan = $arr['artisan'];
$closeness = $arr['closeness'];
//check if `$artisan` key does not exists in `$new_array`
if(!array_key_exists($artisan, $new_array)) {
//create key in `$new_array` if it doesn't exist already
//for this key, create an array containing the values in the format you need
$new_array[$artisan] = [
'artisan' => $artisan,
'closeness' => $closeness
];
} else {
//increase closeness in `$new_array` with key `$artisan` if key did already exist
$new_array[$artisan]['closeness'] += $closeness;
}
}
//replace keys which contain `$artisan` with sequential numbers, as per your expected output.
//if you don't do this, it will still work, but your array keys will be equal to the artisan type.
$new_array = array_values($new_array);
print_r($new_array);
結果：
Array
(
[0] => Array
(
[artisan] => carpenter
[closeness] => 1.6
)
[1] => Array
(
[artisan] => brick layer
[closeness] => 1.3
)
[2] => Array
(
[artisan] => electrician
[closeness] => 0.9
)
)
如果刪除該array_values()行，結果將如下所示：
Array
(
[carpenter] => Array
(
[artisan] => carpenter
[closeness] => 1.6
)
[brick layer] => Array
(
[artisan] => brick layer
[closeness] => 1.3
)
[electrician] => Array
(
[artisan] => electrician
[closeness] => 0.9
)
)
冉冉說
TA貢獻1877條經驗 獲得超1個贊
怎么樣：
$results = array(); // create results array
foreach( $array as $k => $i ) {
$found = false;
foreach ( $results as $k => $r ) {
if ( $r[ "artisan" ] == $i[ "artisan" ] ) {
$results[ $k ][ "closeness" ] += $i[ "closeness" ];
$found = true;
break;
}
}
if ( ! $found ) array_push( $results, $i );
}
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