Remove array elements that are less than X
- by GGio
I have arrays:
$arr1 = array(5, 3, 9, 11, 6, 15);
$arr2 = array(11, 20, 1, 3, 8);
Now I need to loop through $arr1 and find the largest number that is less than X:
foreach($arr1 as $x) {
//need element that is MAX in $arr2 but is less than $x
}
so for example for the first run when $x = 5, maximum in $arr2 is 3 that is less than 5.
Is it possible to do this without having nested loop? I do not want to loop through $arr2. I tried using array_filter but didnt really work. Maybe I used it wrong.
This is what I tried with array_filter:
$results = array();
foreach($arr1 as $x) {
$max = max(array_filter($arr2, function ($x) { return $x < $y; }));
$results[$x] = $max;
}
The result should be this:
5 => 3,
3 => 1,
9 => 8,
11 => 8,
6 => 3,
15 => 11
