Php 如何通过特定键通过其他特定键获取值
我有以下数组:Php 如何通过特定键通过其他特定键获取值,php,arrays,Php,Arrays,我有以下数组: Array ( [0] => Array ( [id] => pencil [label] => blue pencil 123 ) [1] => Array ( [id] => eraser [label] => green eraser 123 ) ) 我知道id(橡皮擦),但我不知道标签(绿色橡皮擦12
Array
(
[0] => Array
(
[id] => pencil
[label] => blue pencil 123
)
[1] => Array
(
[id] => eraser
[label] => green eraser 123
)
)
我知道id(橡皮擦),但我不知道标签(绿色橡皮擦123),如何通过已知的唯一id(橡皮擦)获得标签(绿色橡皮擦123)
我可以在每个元素的循环中执行此操作吗?尝试以下操作:
$arr = [
[
'id' => 'pencil',
'label' => 'blue pencil 123',
],
[
'id' => 'eraser',
'label' => 'green eraser 123',
],
];
function getLabelFromId ($arr, $id) {
foreach ($arr as $row) {
if ($row['id'] == $id) {
return $row['label'];
}
}
return null;
}
var_dump(getLabelFromId($arr, 'pencil'));
var_dump(getLabelFromId($arr, 'eraser'));
产出:
string(15) "blue pencil 123"
string(16) "green eraser 123"
试试这个:
$arr = [
[
'id' => 'pencil',
'label' => 'blue pencil 123',
],
[
'id' => 'eraser',
'label' => 'green eraser 123',
],
];
function getLabelFromId ($arr, $id) {
foreach ($arr as $row) {
if ($row['id'] == $id) {
return $row['label'];
}
}
return null;
}
var_dump(getLabelFromId($arr, 'pencil'));
var_dump(getLabelFromId($arr, 'eraser'));
产出:
string(15) "blue pencil 123"
string(16) "green eraser 123"
是的,试试Loop是的,试试Loop谢谢你的帮助和回应,你太棒了:)谢谢你的帮助和回应,你太棒了:)