PHPExcel reader — help required

I m using PHPExcel to read data from Excel sheet and store in mysql table, till now i m able to upload .xls as well as .xlsx file and after uploading the xls i got below table structure of data

name    start_date              end_date               city
one 11/25/2011 3:30:00 PM   11/29/2011 4:40:00 AM   Jaipur
two 10/22/2011 5:30:00 PM   10/25/2011 6:30:00 AM   Kota
three  3/10/2011 2:30:00 PM 3/11/2011 12:30:00 AM   Bikaner
                                                    chandigarh

now i have some problems, please suggest me the optimized method

1. how do we get the sheet name ( bcoz in one excel there are 7 sheets )

2. for now what i do to store these data into db, below is the code snippet

   $inputFileName = "test.xls"; 
   $inputFileType = PHPExcel_IOFactory::identify($inputFileName); 
   $objReader = PHPExcel_IOFactory::createReader($inputFileType); 
   $objReader->setReadDataOnly(true); 
   /** Load $inputFileName to a PHPExcel Object **/ 
   $objPHPExcel = $objReader->load($inputFileName); 
   $total_sheets=$objPHPExcel->getSheetCount(); // here 4 
   $allSheetName=$objPHPExcel->getSheetNames(); // array ([0]=>'student',[1]=>'teacher',[2]=>'school',[3]=>'college') 
   $objWorksheet = $objPHPExcel->setActiveSheetIndex(0); // first sheet 
   $highestRow = $objWorksheet->getHighestRow(); // here 5 
   $highestColumn = $objWorksheet->getHighestColumn(); // here 'E' 
   $highestColumnIndex = PHPExcel_Cell::columnIndexFromString($highestColumn); // here 5 
   for ($row = 1; $row getCellByColumnAndRow($col, $row)->getValue(); 
    if(is_array($arr_data) ) { $arr_data[$row-1][$col]=$value; } 
    } 
   }
   print_r($arr_data);
   

and this returns

Array
(
[0] => Array
    (
        [0] => name
        [1] => start_date
        [2] => end_date
        [3] => city
        [4] =>         
    )

[1] => Array
    (
        [0] => one  
        [1] => 40568.645833333
        [2] => 40570.5
        [3] => Jaipur
        [4] => 
    )
[2] => Array
    (
        [0] => two 
        [1] => 40568.645833333
        [2] => 40570.5
        [3] => Kota
        [4] => 
    )
[3] => Array
    (
        [0] => three
        [1] => 40568.645833333
        [2] => 40570.5
        [3] => Bikaner
        [4] => 
     )
  [4] => Array
    (
        [0] => 
        [1] => 
        [2] => 
        [3] => Chandigarh
        [4] => 
    )

)

i need that

• header of each excel sheet (i.e. first row) become key of array($arr_data) and
• rest become the value of array.
• time changed into some integer value, that shoud be same as in excel sheet
• blank field ( i.e.blank header column ) of array in all row should be truncated (here [4] )
• if first field of an excel sheet (or combined condition on some fields) is not fulfilled then that row should not be added into array

i.e. desired array should look like

Array  
    (  
    [0] => Array  
    (  
      [name] => one  
      [start_date] => 11/25/2011 3:30:00 PM  
      [end_date] => 11/29/2011 4:40:00 AM  
      [city] => Jaipur  
    )  
    [1] => Array  
    (  
      [name] => two  
      [start_date] => 10/22/2011 5:30:00 PM  
      [end_date] => 10/25/2011 6:30:00 AM  
      [city] => Kota  
    )  
    [2] => Array  
    (  
      [name] => three  
      [start_date] => 3/10/2011 2:30:00 PM  
      [end_date] => 3/11/2011 12:30:00 AM  
      [city] => Bikaner  
    )  
)

and after that i store data into my db using mysql action on desired array.

• is there any other short method to store above data in db

Note: Please do not refer manual( it is really really very bad )... just tell me the methods name..

update

@Mark Thanks for your solution, it helps me a lot, but still some problems are there

• how to handle empty/blank cell in excel sheet..bcoz when any cell are empty then it display a notice

Notice: Undefined index: C in C:\xampp\htdocs\xls_reader\Tests\excel2007.php on line 60
Notice: Undefined index: D in C:\xampp\htdocs\xls_reader\Tests\excel2007.php в строке 60

, тогда как в строке 60 указано

foreach($headingsArray as $columnKey => $columnHeading) { 
    $namedDataArray[$r][$columnHeading] = $dataRow[$row]$columnKey];
}

• , как установить условия перед извлечением массива полных данных, т.е. если я хочу, чтобы если первый и второй столбцы были пустыми / пустыми в любой строке, то эту строку не следует добавлять в желаемый array

спасибо