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  1. <?php
  2.  
  3. // your code goes here
  4. $true1 = true;
  5.  
  6. if(!$true1 && !($id = true)){
  7. }
  8.  
  9. var_dump($id);
Success #stdin #stdout #stderr 0.01s 82560KB
stdin
Standard input is empty
stdout
NULL
stderr
PHP Notice:  Undefined variable: id in /home/5i5UMy/prog.php on line 10