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strlen param
  1. <?php
  2.  
  3. // your code goes here
  4. $param = '';
  5. $param2 = null;
  6. $param3 = '0';
  7.  
  8. var_dump(!strlen($param) || is_null($param));
  9. var_dump(!strlen($param2) || is_null($param2));
  10. var_dump(!strlen($param3) || is_null($param3));
  11.  
  12. ?>
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