php – MySQL仅更新表中的某些字段

class Example
{
   function UpdateRecord($editedRecord)
    {
        //Fetch existing record from the database
        $originalRecord=DB::fetchExample($editedRecord->getId()) 
        //validate each edited field and it is valid then assign its value
        //to the originalRecord's field

        if(IsValid($editedRecord->getName())
          {
            $originalRecord->setName($editedRecord->getName());
          }
        .....

        //update the record.
        $originalRecord->Update(); 
    }
}