how to use array_merge_recursive on 1 array with same keys - php

Question

i have 1 array like below :
0 => array:4 [
"id" => "1"
"date" => "2021-08-03"
"from_time" => "09"
"to_time" => "14"
]
1 => array:4 [
"id" => "2"
"date" => "2021-08-03"
"from_time" => "09"
"to_time" => "14"
]
now what i want to do ?? as you can see the date and from_time and to_time have the same value . i want to merge them to 1 item like below :
0 => array:4[
"date" => "2021-08-03"
"from_time" => "09"
"to_time" => "14"
"id" => ["1" , "2"]
].
so i can have the same day ids in 1 index of array and if for example the same date and time got 4 ids i get the id key with 4ids . i used array_merge_recursive but it didnt help me with the same keys of an array
this is how i am building the array :
foreach ($arrays as $key => $array) {
$options[$key]['id'] = last(str_split($array['id']));
$options[$key]['date'] = substr($array['id'],0,-2);
$options[$key]['from_time'] = Carbon::createFromTimestamp($array['pickup']['from'])->format('H');
$options[$key]['to_time'] = Carbon::createFromTimestamp($array['pickup']['to'])->format('H');
}
. thanks in advance for help

Answer 1

<?php
//define items
$items = [
[
"id" => "1",
"date" => "2021-08-03",
"from_time" => "09",
"to_time" => "14",
],[
"id" => "2",
"date" => "2021-08-03",
"from_time" => "09",
"to_time" => "14",
]
];
$options = [];
//loop through the items
foreach ($items as $item) {
//set up the hashing key to use to locate if we hit dup entry
$key = "{$item['date']}-{$item['from_time']}-{$item['to_time']}";
//if indexing key not in options = never looked at it before
if (!array_key_exists($key, $options)) {
//have the key points to the current entry
$options[$key] = $item; //attach the whole item to it
//we want the id to be an array to initialize it to be one
$options[$key]['id'] = [];
}
//gets here then we know options[$key] exists
//if the item id not in the id array of our dict
if (!in_array($item['id'], $options[$key]['id'])) {
//add to it
$options[$key]['id'][] = $item['id'];
}
}
//array_values to get the values and not worry about the keys
print_r(array_values($options));

Answer 2

You can do something like this:
$arr = [
[
"id" => "1",
"date" => "2021-08-03",
"from_time" => "09",
"to_time" => "14"
],
[
"id" => "2",
"date" => "2021-08-03",
"from_time" => "09",
"to_time" => "14"
],
[
"id" => "3",
"date" => "2021-08-03",
"from_time" => "14",
"to_time" => "16"
]
];
$res = array_reduce($arr, function($carry, $entry) use(&$arr) {
$matches = array_filter($arr, function($item) use($entry) {
return $item['from_time'] === $entry['from_time'] && $item['to_time'] && $entry['to_time'];
});
//print_r([ $entry['id'], $matches ]);
foreach($matches as $match) {
unset($arr[array_search($match['id'], array_column($matches, 'id'))]);
}
if (!count($matches)) {
return $carry;
}
$carry[] = [
'id' => array_column($matches, 'id'),
'date' => $entry['date'],
'from_time' => $entry['from_time'],
'to_time' => $entry['to_time'],
];
return $carry;
}, []);