How to calculate interval for dates of averages?

Question

PHP

Please tell me how to calculate average values ​​for dates.
For example, there are several arrays (two or more) with a date (in UNIX_TIMESTAMP format) and a value (int), for example:
Array 1:

array(
'1555349037' => 8,
'1555349027' => 11,
'1555349017' => 2 ,
...
)

Array 2:

array(
'1555349035' => 2,
'1555349029' => 5,
'1555349017' => 9 ,
...
)

How to build a new array with a date (for example, an interval of 10 seconds) and the average values ​​of the nearest values ​​​​to these dates?

Answer 1

1. You find the minimum and maximum values ​​of dates in all arrays. (from 1555349000 to 1555349100, for example).
2. You build a new array according to the principle of min date to max date in 10 sec increments, or as much as you need.
3. You are looking for keys in all arrays according to the principle>=date, <date + 10 sec. (>=1555349000 && <1555349010)
4. Calculate the average value for all found data and save it under the desired key.