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  1. <?php
  2.  
  3. $old = array(5,5,4); 
  4. $new = array(5,5,4,4); 
  5.  
  6. function array_subtract($a, $b)
  7. {
  8.     foreach ($b as $val) {
  9.         $i = array_search($val, $a);
  10.         if ($i !== false) {
  11.             unset($a[$i]);
  12.         }
  13.     }
  14.  
  15.     return array_values($a);
  16. }
  17.  
  18. $result = array_subtract($new, $old);
  19.  
  20. var_dump($result);
Success #stdin #stdout 0.02s 13112KB
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Standard input is empty
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array(1) {
  [0]=>
  int(4)
}
https://ideone.com/UNRKV
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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