Move or shift php array keys [duplicate] - php

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Closed 2 years ago.
Not quite sure how to word this correctly, but I am looking for some help to to move/shift array keys so that the top level array doesn't contain another array with only one item. Basically from this:
[0] => Array
(
[0] => Array
(
[_id] => 3
[title] => Award winning wedding venue
[subtitle] => Creating a website to reflect the prestige of the brand
)
)
[1] => Array
(
[0] => Array
(
[_id] => 5
[title] => Bringing storytelling to life
[subtitle] => Bringing storytelling to life
)
)
to be like this:
[0] => Array
(
[_id] => 3
[title] => Award winning wedding venue
[subtitle] => Creating a website to reflect the prestige of the brand
)
[1] => Array
(
[_id] => 5
[title] => Bringing storytelling to life
[subtitle] => Bringing storytelling to life
)
Almost just shifting the array key up one.
The original array is created using the following:
// Start with manual relation otherwise default to next/prev
foreach ($item['related'] as $id) {
$related[] = perch_collection('Projects', [
'filter' => [
[
'filter' => '_id',
'match' => 'eq',
'value' => $id,
],
// Item is enabled
[
'filter' => 'status',
'match' => 'eq',
'value' => 'enabled',
],
],
'skip-template' => true,
], true);
}

Answer 1

It would be best if you modify the creation of your array instead of changing it afterwards.
// Start with manual relation otherwise default to next/prev
foreach ($item['related'] as $id) {
$related[] = perch_collection('Projects', [
'filter' => [
[
'filter' => '_id',
'match' => 'eq',
'value' => $id,
],
// Item is enabled
[
'filter' => 'status',
'match' => 'eq',
'value' => 'enabled',
],
],
'skip-template' => true,
], true)[0];
}
Note the [0] at the end of the perch_collection() function call. This is essentially the same as the second part of my answer, it just occurs earlier.
With that said, if you still want to change it after the original array is made, you could just use a simple foreach loop with a reference to the original array.
foreach($array as &$arr) {
$arr = $arr[0];
}
Using & in front of $arr is a reference. This means the loop will alter the original array, so it prevents the overhead of a temporary array.
mickmackusa let me know about another solution using array_column(), which avoids the loop completely.
$array = array_column($array, 0);

Answer 2

The best way to fix this problem would be at the source. This looks like a Dataset received from a database, so instead of trying to manipulate the array after you received it, you could also try to generate it in the correct format. Most DALs have methods to manipulate the return type of the resultset.
However, if that is not possible and you always only have a single element nested, this loop should do the trick.
for($i = 0; $i <= count($array); $i++) {
$shifted[$i] = $array[$i][0];
}