For-each loop, larger than 20 into another array - php

Question

I'm stuck on this exercise that I can't seem to get for the life of me.
$numbers2 = [21, 5, 4, 6, 76, 2, 18, 85, 55, 1];
foreach ($numbers2 as &$value) {
$largeNumbers[] = $value > 20;
}
That's the code I have so far. What I am trying to do here is use a for-each loop to add all the numbers that are larger than 20 into another Array, which I have named $largeNumbers. The code I have inserted above seems to be printing out true and false values, which is not what I was going for. I'd really appreciate it someone could tell me what I'm possibly doing wrong or even show me a better way. I have to use a for-each loop.

Answer 1

For each item, you are checking if it's larger than 20, which results in a boolean value (it either is or is not), and you then store this value to the result array. Instead, you could use an if statement` to only take the elements that answer the condition:
foreach ($numbers2 as &$value) {
if ($value > 20) {
$largeNumbers[] = $value;
}
}

Answer 2

<?php
$nums = [21, 5, 4, 6, 76, 2, 18, 85, 55, 1];
$less_than_or_equal_to_20 = [];
foreach($nums as $v)
if($v <= 20)
$less_than_or_equal_to_20[] = $v;
$out = array_diff($nums, $less_than_or_equal_to_20);
var_export($out);
Output:
array ( 0 => 21, 4 => 76, 7 => 85, 8 => 55, )

Answer 3

<?php
$nums = [21, 5, 4, 6, 76, 2, 18, 85, 55, 1];
foreach([$nums] as $v)
$out = array_filter($v, function($v) {
return $v > 20;
});
var_export($out);
Output:
array ( 0 => 21, 4 => 76, 7 => 85, 8 => 55, )