PHP - Convert a Single Array into a Multidimensional Array [closed] - php

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I'm newbie in PHP.
I need send data for API purpose.
I have array print_r($detail) like this
Array
(
[0] => Array
(
[id] => item1
)
[1] => Array
(
[price] => 300
)
[2] => Array
(
[quantity] => 1
)
[3] => Array
(
[id] => item2
)
[4] => Array
(
[price] => 400
)
[5] => Array
(
[quantity] => 2
)
)
And I want convert it to multidimensional before sending to another process, like
Array
(
[0] => Array
(
[id] => item1
[price] => 300
[quantity] => 1
)
[1] => Array
(
[id] => item2
[price] => 400
[quantity] => 2
)
)
How it is possible?

Answer 1

You can split your $details array into multiple chunks. I've written the following function which accepts a custom chunk size (note count($initialArray) % $chunkSize === 0 must be true):
function transformArray(array $initialArray, $chunkSize = 3) {
if (count($initialArray) % $chunkSize != 0) {
throw new \Exception('The length of $initialArray must be divisible by ' . $chunkSize);
}
$chunks = array_chunk($initialArray, 3);
$result = [];
foreach ($chunks as $chunk) {
$newItem = [];
foreach ($chunk as $item) {
$newItem[array_keys($item)[0]] = reset($item);
}
$result[] = $newItem;
}
return $result;
}
Given your details array, calling transformArray($details) will result in:
The customizable chunk size allows you to add more data to your source array:
$details = [
['id' => 'item1'],
['price' => 300],
['quantity' => 1],
['anotherProp' => 'some value'],
['id' => 'item2'],
['price' => 400],
['quantity' => 2],
['anotherProp' => 'another value'],
];
The function call is now transformArray($details, 4);:

Answer 2

This version may be with the same result of #PHPglue answer. But this takes only one foreach. I think this is faster, more efficient way as stated here by one of the Top SO Users.
Try to look if you want it.
Live Demo
<?php
function explodeArray($arr)
{
$newArr = array();
foreach($arr as $row)
{
$key = array_keys($row)[0];
$curArr = count($newArr) > 0 ? $newArr[count($newArr)-1] : array();
if( array_key_exists($key, $curArr) )
{
array_push($newArr, array($key=>$row[$key]) );
}
else
{
$index = count($newArr) > 0 ? count($newArr) - 1 : 0 ;
$newArr[$index][$key] = $row[$key];
}
}
return $newArr;
}
Different Arrays for testing.
$detail = array(
array('id'=>'item1'),
array('price'=>300),
array('quantity'=>1),
array('id'=>'item2'),
array('price'=>400),
array('quantity'=>2)
);
var_dump( explodeArray($detail) );
$detail_match = array(
array('id'=>'item1'),
array('price'=>300),
array('quantity'=>1),
array('newkey'=>'sample'),
array('id'=>'item2'),
array('price'=>400),
array('quantity'=>2),
array('newkey'=>'sample')
);
var_dump( explodeArray($detail_match) ); // Works with any size of keys.
$detail_diff_key = array(
array('id'=>'item1'),
array('price'=>300),
array('quantity'=>1),
array('diff1'=>'sample1'),
array('id'=>'item2'),
array('price'=>400),
array('quantity'=>2),
array('diff2'=>'sample2')
);
var_dump( explodeArray($detail_diff_key) ); // Works with any size of keys and different keys.
$detail_unmatch = array(
array('id'=>'item1'),
array('price'=>300),
array('quantity'=>1),
array('unmatchnum'=>'sample1'),
array('id'=>'item2'),
array('price'=>400),
array('quantity'=>2)
);
var_dump( explodeArray($detail_unmatch) );

Answer 3

I think this little block of code work for you.
Use:
$detail = array(
"0" => array("id" => "item1"),
"1" => array("price" => "300"),
"2" => array("quantity" => "1"),
"3" => array("id" => "item2"),
"4" => array("price" => "400"),
"5" => array("quantity" => "2"),
"6" => array("id" => "item3"),
"7" => array("price" => "500"),
"8" => array("quantity" => "3")
);
$i = 0;
$j = 0;
$multi_details = array();
while($j < count($detail)){
$multi_details[$i][id] = $detail[$j++][id];
$multi_details[$i][price] = $detail[$j++][price];
$multi_details[$i][quantity] = $detail[$j++][quantity];
$i++;
}
echo '<pre>';
print_r($multi_details);
echo '</pre>';
Output:
Array
(
[0] => Array
(
[id] => item1
[price] => 300
[quantity] => 1
)
[1] => Array
(
[id] => item2
[price] => 400
[quantity] => 2
)
[2] => Array
(
[id] => item3
[price] => 500
[quantity] => 3
)
)

Answer 4

Something like this should do it
$newArray = array();
$newRow = array();
foreach ($array as $row) {
$key = array_keys($row)[0];
$value = array_values($row)[0];
if ($key == 'id') {
$newArray[] = $newRow;
}
$newRow[$key] = $value;
}
$newArray[] = $newRow;

Answer 5

This version looks for repeat keys then creates a new Array whenever they are the same so you could have some different data. Hope it helps.
function customMulti($customArray){
$a = array(); $n = -1; $d;
foreach($customArray as $i => $c){
foreach($c as $k => $v){
if(!isset($d)){
$d = $k;
}
if($k === $d){
$a[++$n] = array();
}
$a[$n][$k] = $v;
}
}
return $a;
}
$wow = customMulti(array(array('id'=>'item1'),array('price'=>300),array('quantity'=>1),array('id'=>'item2'),array('price'=>400),array('quantity'=>2)));
print_r($wow);