[英]PHP convert multi dimensional array into single dimensional array by key
Array: 数组:
Array
(
[0] => Array
(
[ID] => 11,
[Create_date] => 2017-11-23
),
[1] => Array
(
[ID] => 10,
[Create_date] => 2017-11-23
),
[2] => Array
(
[ID] => 9,
[Create_date] => 2017-11-23
),
[3] => Array
(
[ID] => 8,
[Create_date] => 2017-11-23
),
[4] => Array
(
[ID] => 7,
[Create_date] => 2017-11-23
)
);
Expected Array: 预期数组:
array('11','10','9','8', '7');
I know How can I achieve this result by using a loop but for performance improvement, we want to use inbuilt function can anyone please tell us How can we achieve this result? 我知道如何通过使用循环来实现此结果,但是为了提高性能,我们想使用内置函数,任何人都可以告诉我们如何实现此结果?
$array = [
[
"ID" => 11,
"Create_date" => "2017-11-23"
],
[
"ID" => 10,
"Create_date" => "2017-11-23"
],
[
"ID" => 9,
"Create_date" => "2017-11-23"
],
[
"ID" => 8,
"Create_date" => "2017-11-23"
],
];
echo "<pre>";
print_r(array_column($array, "ID"));
?>
Using foreach 使用foreach
foreach ($array as $key=>$value)
{
echo $key.'<br/>';
echo $value['id'].'<br/>';
echo $value['Create_date'].'<br/>';
}
Simple array_map function use. 简单的array_map函数使用。
<?php
$movies = array(
array(
"id" => 11,
"Create_date" => 2017-11-23,
),
array(
"id" => 10,
"Create_date" => 2017-11-23,
),
array(
"id" => 9,
"Create_date" => 2017-11-23,
),
array(
"id" => 8,
"Create_date" => 2017-11-23,
),
array(
"id" => 7,
"Create_date" => 2017-11-23,
)
);
$oneDimensionalArray = array_map('current', $movies);
print_r($oneDimensionalArray);
?>
Output : 输出:
Array ( [0] => 11 [1] => 10 [2] => 9 [3] => 8 [4] => 7 )
$array = [
[
"ID" => 11,
"Create_date" => "2017-11-23"
],
[
"ID" => 10,
"Create_date" => "2017-11-23"
],
[
"ID" => 9,
"Create_date" => "2017-11-23"
],
[
"ID" => 8,
"Create_date" => "2017-11-23"
],
];
foreach ($array as $key=>$value)
{
$id[] = $value['id'];
$creatteDate[] = $value['Create_date'];
}
echo "<pre>"; print_r($creatteDate);
print_r($id);
exit;
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