Check if all arrays inside an array have a specific key - php

Question

Example array:
$items = array(
array('sort': 1, 'name': 'name'),
array('sort': 3, 'name': 'name'),
array('sort': null, 'name': 'name')
);
I need to know if all child arrays have the sort key. If not, I'd manually create the sort via a for loop (and over-write the sort value for the ones that have it).
I'm already running a for loop, and I was thinking of adding another key such as manual_sort which I would equal to index + 1, and after the loop, if at least 1 array didn't have the sort key or if it's null), I'd use the manual_sort instead of the sort key (for example when looping the elements via the front-end or whatever usage the data has).
Also thought about doing a second loop to know whether or not sort should be overwritten.
These seems like dirty solutions though, any ideas?
My current code looks something like:
$db_sorted_items = true;
for ($i=0; $i < count($items); $i++) {
$items[$i]['name'] = ucfirst($items[$i]['name']);
if (empty($items[$i]['sort']) {
$db_sorted_items = false;
}
$items[$i]['number'] = $i + 1; // $i+1 because sort number starts at 1.
}
// err, gotta use `$items[$i]['number']` (or `sort` had all arrays had a positive `sort` key)

Answer 1

// use array_column to get array for key 'sort'
// then use array_filter to remove null values
// then compare count
if(count($array) == count(array_filter(array_column($array,'sort')))){
echo 'All have valid sort key';
}else{
echo 'No, few are missing';
}
In case if you want to have strict check, to make sure value corresponding to key sort is numeric then you may use below one, using is_numeric
if(count($array)==count(array_filter(array_column($array,'sort'),'is_numeric'))){
}

Answer 2

Your code looks good to me. I'd change it so it refreshes all sort attributes if it finds one object that doesn't have it, like this:
$db_sorted_items = true;
for ($i=0; $i < count($items); $i++) {
$items[$i]['name'] = ucfirst($items[$i]['name']);
if ($db_sorted_items && empty($items[$i]['sort']) {
$db_sorted_items = false;
$i = -1; // Re-start for (the for will add 1 at the end)
}else{
$items[$i]['sort'] = $i + 1; // $i+1 because sort number starts at 1.
}
}