- var_dump: documentation ( source)
- array_filter: documentation ( source)
<?php
$power = [4 => 20, 6 => 0, 18 => 5];
var_dump(array_filter($power));
foreach ($power as $id => $p) {
if (0 === $p) {
unset($power[$id]);
}
}
var_dump($power);