[英]How to extract key=>value pairs from this array
我有這個數組
[InstrumentCategory] => Array
(
[0] => Array
(
[id] => 4
[title] => Training
[InstrumentsCategory] => Array
(
[id] => 56
[instrument_id] => 28
[category_id] => 4
)
)
[1] => Array
(
[id] => 8
[title] => Working time flexibility
[InstrumentsCategory] => Array
(
[id] => 57
[instrument_id] => 28
[category_id] => 8
)
)
[2] => Array
(
[id] => 16
[title] => Income support for workers
[InstrumentsCategory] => Array
(
[id] => 55
[instrument_id] => 28
[category_id] => 16
)
)
)
有沒有其他方法來提取id =>值對(請注意,在這種情況下, id
是子數組中的鍵)而不是for
循環?
提前致謝
如果使用PHP 5.3,則可以使用以下代碼( array_reduce ):
$r = array_reduce($input_array,
function ($res, $cur) {
return $res + array($cur['id'] => $cur);
}, array());
之后, $r
包含id =>值對。
編輯: PHP版本<5.3,您可以執行以下操作:
function array_reduce_cb_id ($res, $cur) {
return $res + array($cur['id'] => $cur);
}
$r = array_reduce($input_array, 'array_reduce_cb_id', array());
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