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  1. <?php
  2.  
  3. $var_1 = [1,2,3];
  4. $var_2 = [1,2,3,5];
  5. //$var_3 = [];
  6. //$var_4 = [];
  7. //$var_5 = [];
  8. //$var_6 = [];
  9. $var_7 = [1,5];
  10.  
  11. $result = call_user_func_array(
  12.         'array_intersect',
  13.         array_filter(
  14.             array( $var_1,$var_2,$var_3,$var_4,$var_5,$var_6,$var_7 ),
  15.             function($a){ return isset($a)  &&  is_array($a)  &&  !!count($a);}
  16.         )
  17.     );
  18.  
  19. print_r( $result);
Success #stdin #stdout #stderr 0.02s 52472KB
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stdin
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Standard input is empty
stdout
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Array
(
    [0] => 1
)
stderr
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PHP Notice:  Undefined variable: var_3 in /home/apb0Uk/prog.php on line 14
PHP Notice:  Undefined variable: var_4 in /home/apb0Uk/prog.php on line 14
PHP Notice:  Undefined variable: var_5 in /home/apb0Uk/prog.php on line 14
PHP Notice:  Undefined variable: var_6 in /home/apb0Uk/prog.php on line 14
https://ideone.com/hWmlwL
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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