(PHP 5 < 5.4.0, PECL sqlite >= 1.0.0)
sqlite_num_fields -- SQLiteResult::numFields -- SQLiteUnbuffered::numFields — Returns the number of fields in a result set
$result
   )面向对象风格 (method):
   Returns the number of fields in the result set.
  
result
     The SQLite result resource. This parameter is not required when using the object-oriented method.
Returns the number of fields, as an integer.