PHP: get value from subarray - php

Question

How do I get the value from a subarray? In this case I'm interested in the locale
$objects=
Array
(
[1397300927159026] => Array
(
[category] => 2
[locale] => de_DE
)
[10152395537445743] => Array
(
[category] => 100
[locale] => en_US
)
)
Desired Output:
Array
(
[1397300927159026] => "de_DE"
[10152395537445743] => "en_US"
)
I've tried using a foreach loop to iterate through but the results are a mess -- thanks for any help.

Answer 1

Just a simple foreach would suffice. You just need to create it in another array. Consider this example:
$objects = array(
'1397300927159026' => array('category' => 2, 'locale' => 'de_DE'),
'10152395537445743' => array('category' => 100, 'locale' => 'en_US'),
);
$new_objects = array();
foreach($objects as $key => $value) {
// $key will contain = 1397300927159026, and 1397300927159026
// set that key into the new array as key also
$new_objects[$key] = $value['locale'];
}
echo '<pre>';
print_r($new_objects);
echo '</pre>';
Sample Output:
Array
(
[1397300927159026] => de_DE
[10152395537445743] => en_US
)

Answer 2

This is what array_map() is for. It loops through the array and applies a callback function to each value and returns the modified array.
$objects = array_map( function( $val ) {
return $val['locale'];
}, $objects );

Answer 3

Check this CodeViper Demo
PHP
<?php
$objects=
Array
(
'1397300927159026' => Array
(
'category' => 2,
'locale' => 'de_DE'
),
'10152395537445743' => Array
(
'category' => 100,
'locale' => 'en_US'
)
);
$arr = array();
foreach($objects as $key => $value) {
$arr[$key] = $value['locale'];
}
print_r($arr);
?>
Result
Array ( [1397300927159026] => de_DE [10152395537445743] => en_US )

Answer 4

You can easily do it with a foreach loop and a new array.
Declare a new array say $abc
<?php
$abc = array();
//Going to loop through original array ($objects) as key and values.
foreach($objects as $key => $val ) {
// $key will contain values 1397300927159026, 10152395537445743
// $val['category'] contain values 2,100
// $val['locale'] contain values de_DE, en_US
$abc[$key] = $val['locale'];
}
print_r($abc);
?>

Answer 5

Replace each subarray with its last element's value? array_map() with end() is pretty succinct ...though it requires your application to keep the element at the end of the subarrays -- so arguably less trustworthy.
Also $objects is a poor variable name choice for a multidimensional array.
Code: (Demo)
var_export(array_map('end', $objects));
Output:
array (
1397300927159026 => 'de_DE',
10152395537445743 => 'en_US',
)