Loop through variables, increment by 10 and create new variable - php

Question

I have $amounts eg. 31; 48; 57; 63; 79; 84 and 95
What I would like to do is loop through each “$amount”, and if they are above 50, create variable that adds 1 for each 10 increment
Eg.
$amount(57) = +1
$amount(63) = +2
$amount(79) = +3
$amount(84) = +4
$amount(95) = +5
UPDATED VERSION:
Apologies for the vague question.
I have
$amount = array(end($percentage));
eg. 47, 63, 79, 95
What I would like to have is another variable to be created eg. $to_add if $amount > 50.
Then for each $amount >= 50 add 1 to the $to_add
Should look like:
$amount(47) = NULL ($to_add = 0)
$amount(50) = $to_add = 1 – *WOULD HAVE BEEN*
$amount(63) = $to_add = 2
$amount(79) = $to_add = 3
$amount(80) = $to_add = 4 – *WOULD HAVE BEEN*
$amount(95) = $to_add = 5
Thanks for the input thus far - I am testing the feedback I have already received - thank you very much!

Answer 1

This should work for you:
(Here I just go through each element with array_map(), then I check if the value is over 50 and if yes I add 1 for every 10)
<?php
$amount = [31, 48, 57, 63, 79, 84, 95];
print_r($amount);
$amount = array_map(function($v){
if($v / 50 >= 1)
return ceil($v + ($v-50)/10);
return $v;
}, $amount);
print_r($amount);
?>
output:
Array ( [0] => 31 [1] => 48 [2] => 57 [3] => 63 [4] => 79 [5] => 84 [6] => 95 )
Array ( [0] => 31 [1] => 48 [2] => 58 [3] => 65 [4] => 82 [5] => 88 [6] => 100 )

Answer 2

Somewhat like this:
$array=array();
$i=0;
foreach($amounts as $amount){
if($amount>50){
$value=floor($amount/10);
$array[$i]=$value;
$i++;
}
}
var_dump($array);
Now $array contains the values you want. You have to adapt the code to your code since I have no idea what $amount is(I assume values of an array)