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  1. <?php
  2. $a = 123456;
  3. $arr = array_pad(str_split($a), -7, "");
  4. var_dump($arr);
  5. ?>
Success #stdin #stdout 0.02s 13112KB
stdin
Standard input is empty
stdout
array(7) {
  [0]=>
  string(0) ""
  [1]=>
  string(1) "1"
  [2]=>
  string(1) "2"
  [3]=>
  string(1) "3"
  [4]=>
  string(1) "4"
  [5]=>
  string(1) "5"
  [6]=>
  string(1) "6"
}