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  1.  
  2.  <?php
  3.  
  4. $a = array(
  5.     'a' => NULL,
  6.     'b' => 1,
  7.     'c' => 1
  8. );
  9.  
  10. $b = array(
  11.     'a' => 1,
  12.     'b' => NULL,
  13.     'c' => 1    
  14. );
  15.  
  16. $b  = array_filter($b);
  17. $a  = array_filter($a);
  18. $c = array_merge($a, $b);
  19. var_dump($c);
  20.  
  21.  
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(3) {
  ["b"]=>
  int(1)
  ["c"]=>
  int(1)
  ["a"]=>
  int(1)
}
https://ideone.com/IE7PO0
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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