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  1. <?php
  2.  
  3. $arr2 = array(1,2,3,4);
  4.  
  5. function sum($carry, $item)
  6. {
  7.     $carry += $item;
  8.     return $carry;
  9. }
  10.  
  11. function sub($carry, $item)
  12. {
  13.     $carry -= $item;
  14.     return $carry;
  15. }
  16.  
  17. function foo2($mass, $func){
  18. 	$res = array_reduce($mass, $func, $mass[0]);
  19.  
  20.     return call_user_func($func, $res, -$mass[0]);
  21. };
  22.  
  23. echo foo2($arr2, "sub");
  24. echo "\n";
  25. echo foo2($arr2, "sum");
Success #stdin #stdout 0.01s 52488KB
comments (?)
stdin 
Standard input is empty
stdout 
-8
10
https://ideone.com/VHSO24
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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