Code to remove null elements from an array in php with array_filter

remove_nulls_in_array.php

<?php
$array = [null, 1,  null, 2, 3, 5];
var_dump(array_filter($array)); 

// This also works for numeric index values, notice how the null value indexes are stripped
$array = [
  0 => null, 
  1 => 22, 
  2 => null, 
  3 => 1, 
  4 => 33, 
  5 => 57
];
var_dump(array_filter($array)); // Should print [1 => 22, 3 => 1, 4 => 33, 5 =>57]

// For associative arrays the null keys are unset //
$array = [
  'lol' => null, 
  'more' => 22, 
  'nope' => null, 
  'wow'  => 1,  
];
print_r(array_filter($array)); // Should print [[more] => 22 [wow] => 1]