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  1. <?php
  2.  
  3.     $a = array(
  4. 		'a' => NULL,
  5. 		'b' => 1,
  6. 		'c' => 1,
  7. 		'd' => NULL
  8. 	);
  9.  
  10. 	$b = array(
  11. 		'a' => 1,
  12. 		'b' => NULL,
  13. 		'c' => 1,   
  14. 		'd' => NULL,
  15. 	);
  16.  
  17. 	$c = array();
  18. 	foreach($a as $key => $val)
  19. 	{
  20. 		if($key == NULL && $b[$key] == NULL)
  21. 		{
  22. 			$c[$key] = $val;
  23. 		} else if($key != NULL && $b[$key] == NULL) {
  24. 			$c[$key]= $val;
  25. 		} else if($key != NULL && $b[$key] != NULL) {
  26. 			$c[$key]= $b[$key];
  27. 		} else {
  28. 			$c[$key]= $b[$key];
  29. 		}
  30. 	}
  31. 	var_dump($c);
Success #stdin #stdout 0.01s 20568KB
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stdin
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Standard input is empty
stdout
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array(4) {
  ["a"]=>
  int(1)
  ["b"]=>
  int(1)
  ["c"]=>
  int(1)
  ["d"]=>
  NULL
}
https://ideone.com/oxIe2q
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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