How can I convert a multidimensional array into one level array? [duplicate] - php

Question

This question already has answers here:
Turning multidimensional array into one-dimensional array [duplicate]
(11 answers)
Closed 2 years ago.
I have a multidimensional array, but I want to put all values into one single array:
array:28 [▼
0 => array:8 [▼
0 => "id"
1 => "monkey"
2 => "horse"
3 => "bird"
4 => "elephant"
5 => "cat"
6 => "whale"
7 => "frog"
]
1 => array:4 [▼
0 => "id"
1 => "whale"
2 => "lion"
3 => "dog"
]
2 => array:4 [▶]
3 => array:4 [▶]
4 => array:3 [▶]
5 => array:4 [▶]
6 => array:10 [▶]
7 => array:3 [▶]
8 => array:5 [▶]
9 => array:18 [▶]
10 => array:3 [▶]
11 => array:4 [▶]
12 => array:5 [▶]
13 => array:3 [▶]
14 => array:6 [▶]
15 => array:3 [▶]
16 => array:3 [▶]
17 => array:3 [▶]
18 => array:3 [▶]
19 => array:4 [▶]
20 => array:6 [▶]
21 => array:3 [▶]
22 => array:5 [▶]
23 => array:8 [▶]
24 => array:3 [▶]
25 => array:5 [▶]
26 => array:3 [▶]
27 => array:5 [▶]
]
My approach:
$singleArray = array();
foreach ($multiArray as $key => $value){
$singleArray[] =$value;
array_merge($singleArray, $value);
}
dump($singleArray);
But this is again creating a multidimensional array

Answer 1

It looks like you want all sub array values to be in the single array.
$singleArray = [];
foreach($multiarray as $array) {
$singleArray = array_merge($singleArray, array_values($array));
}
This may contain some values as a duplicate. To clean them up you can do
$uniqueValues = array_unique($singleArray);

Answer 2

You can use this function to convert nested array to one array.
<?php
$a = ["a","b","c",["d","e",["f","g"]],["p","q","r"],["s","t","u"]];
function convert(array $array){
$arr = [];
foreach ($array as $item) {
if(is_array($item)){
$arr = array_merge($arr, convert($item));
}else {
$arr[] = $item;
}
}
return $arr;
}
echo "<pre>";
print_r(convert($a));
echo "</pre>";
?>

Answer 3

Did you try with array_merge?
$array = array(yourArray1(), yourArray2());
$oneLevelArray = array_reduce($array, 'array_merge', array());