Php multidimentional array convert to one dimentional [duplicate] - php

Question

This question already has answers here:
Multidimensional array to array
(4 answers)
Closed 6 years ago.
I have an array which consist monthly information as shown below :
[appr] => Array
(
[0] => Array
(
[month] => August
[approd] => 23
)
[1] => Array
(
[month] => September
[approd] => 546
)
[2] => Array
(
[month] => October
[approd] => 234
)
)
I want the output as below
[appr] => Array(
August => 23,
September => 546,
October => 234
)
can anybody help me to achieve this using php.

Answer 1

If you're looking for a simple one-liner solution, use array_column() and array_combine() functions.
Try this:
$array['appr'] = array_combine(array_column($array['appr'], "month"), array_column($array['appr'], "approd"));

Answer 2

Simply loop in your array and create a new array
$array = array(array('month'=>'August','approd'=>'23'),array('month'=>'September','approd'=>'56'),array('month'=>'October','approd'=>'234'),);
$new = array();
foreach($array as $val) {
$new['appr'][$val['month']] = $val['approd'];
}

Answer 3

"One-line" solution using array_column function:
$arr['appr'] = array_column($arr['appr'], 'approd', 'month');
print_r($arr);
The output:
Array
(
[appr] => Array
(
[August] => 23
[September] => 546
[October] => 234
)
)

Answer 4

Another option is to use array_walk_recursive:
<?php
$array = array(
0 => array(
'something',
),
1 => array(
'else',
)
);
// If the keys are unique
$newArray = array();
array_walk_recursive($array, function($v, $k) use (&$newArray) {
$newArray[$k] = $v;
});
// If you have duplicate keys
$newArray = array();
array_walk_recursive($array, function($v) use (&$newArray) {
$newArray[] = $v;
});
And finally output the result:
print_r($newArray);
Resources
array_walk_recursive - Manual