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  1. <?php
  2. function drop($var, $remove) 
  3.   { 
  4.  
  5. if(count($var) == 1) 
  6.     {
  7.  
  8. return $var; 
  9.     }
  10.  
  11.   foreach($var as $key => $element) 
  12.     { 
  13.     if($remove) 
  14.       { 
  15.       $remove = false; 
  16.       } 
  17.     else 
  18.       { 
  19.       $remove = true; 
  20.       unset($var[$key]); 
  21.       //echo $var[$key];
  22.       } 
  23.  
  24.     } 
  25.  
  26.  
  27.     return drop($var, $remove);
  28.  
  29.   } 
  30.  
  31. //fill array 
  32. $arychairs = range(1,100); 
  33.  
  34. //extract survivor from function drop;
  35. $survivor=drop($arychairs, false); 
  36. echo "Survivor is at position ".array_pop($survivor);
  37. ?>
Success #stdin #stdout 0.02s 13112KB
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stdin
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Standard input is empty
stdout
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Survivor is at position 72
https://ideone.com/nD2Dp
language:
PHP (php 7.3.5)
created:
14 years ago
visibility:
public

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