I'm adding [] this symbol within an execute() in PDO, and it returns error.
I'm working in WAMP5
 $sqlStatement="
  SELECT * 
  FROM $table_results 
  WHERE title = ? AND id_category = ?
  ";    
   $stmt = $bdConection->prepare($sqlStatement);
   $stmt->execute([$title, $id_category]);
   echo $stmt->rowCount();
It works well if I delete WHERE title = ? AND id_category = ? and [$title, $id_category] bur returns more results, instead of adding those ... then
IT RETURNS: 
Parse error: syntax error, unexpected '[', expecting ')' in
 
    