- array_values: documentation ( source)
- array_diff: documentation ( source)
<?php
$array = [
1 => 'value1',
2 => [],
3 => '',
2 => [
1 => 'value1',
2 => [],
3 => 'value3',
4 => '',
],
4 => 'value4',
];
array_values(array_diff($array, ['']));