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Aug 23rd, 2019
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  1. <?php
  2.  
  3. function array_insert(array $array, int $key, $value)
  4. {
  5. $length = count($array);
  6. $result = [];
  7.  
  8. for ($i = 0; $i <= $length; ++$i) {
  9. if ($i === $key) {
  10. $result[$i] = $value;
  11. $result[$i + 1] = $array[$i];
  12. ++$i;
  13. }
  14. else if ($i > $key) {
  15. $result[$i] = $array[$i - 1];
  16. }
  17. else {
  18. $result[$i] = $array[$i];
  19. }
  20.  
  21. }
  22.  
  23. return $result;
  24. }
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