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  1. <?php
  2.  
  3. $a = containsOnlyNull([null,null,null,null,null]);
  4. $b = containsOnlyNull([null,null,1,null,null]);
  5.  
  6. echo ($a ? "all nulls" : "not all nulls") . PHP_EOL;
  7. echo ($b ? "all nulls" : "not all nulls");
  8.  
  9.     function containsOnlyNull($arr) {
  10.     	return array_reduce($arr, function($carry, $item) {
  11.     		return $carry += (is_null($item) ? 0 : 1);
  12.     	}, 0) > 0 ? false : true;
  13.     }
Success #stdin #stdout 0.02s 24448KB
comments (?)
stdin 
Standard input is empty
stdout 
all nulls
not all nulls
https://ideone.com/tkmZm5
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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