我如何在使用PHPExcel脚本时格式化日期格式的一些列

当我使用PHPExcel脚本时，我有一个日期格式问题

我有以下代码从wpdb Query生成xlsx文件:

<?php
# Load slim WP
define( 'WP_USE_THEMES', false );
require( './wp-load.php' );
# http://phpexcel.codeplex.com/
require_once dirname(__FILE__) . '/Classes/PHPExcel.php';
global $wpdb;
$query = "Select
  tsales_funnel.ID As ID,
  wp_users.display_name As Darijuma_vaditajs,
  tcportal_starpnieks.Cp_Name As Starpnieks,
  tcportal_stucture.Cp_Name As OWCA,
  n_products.Product_Nos As Produkts,
  tsales_funnel_mrecord.Product_type as Produkta_kods,
    tsales_funnel.Sanems_date as Saņēmšanas_datums,
  tsales_funnel_mrecord.Deadline As Deadline,
  n_sf_statusi.nosaukums_lv As Statuss,
  tsales_funnel_clients.Reg_nr As Klienta_Regnr,
  tfirmas_reg.name_in_quotes As Klients,
  tsales_funnel_mrecord.Faze_date as Faze_date,
  n_sf_fazes.nosaukums_lv As Faze,
  tsales_funnel_mrecord.Summa As Apdrošīnājuma_summa,
  tsales_funnel_mrecord.Vien_skaits As TRL_skaits,
  tsales_funnel_mrecord.Compensa_cena,
  tsales_funnel_mrecord.Tirgus_cena,
  wp_users02.display_name As Riska_parakstitajs,
  comm.Comment as Aizveršanas_komentārs
From
  tsales_funnel Left Join
  tsales_funnel_mrecord On tsales_funnel.ID = tsales_funnel_mrecord.Funnel_ID
  Left Join
  tcportal_starpnieks On tcportal_starpnieks.Cp_code = tsales_funnel.Starpnieks
  Left Join
  tcportal_stucture On tcportal_stucture.Cp_code = tsales_funnel.OWCA Left Join
  tsales_funnel_clients On tsales_funnel_clients.Funnel_ID = tsales_funnel.ID
  Left Join
  tfirmas_reg On tfirmas_reg.regcode = tsales_funnel_clients.Reg_nr Left Join
  wp_users On tsales_funnel.Darijuma_vaditajs = wp_users.user_login Left Join
  n_sf_statusi On n_sf_statusi.id = tsales_funnel.Statuss
  Left Join n_sf_fazes on tsales_funnel_mrecord.Product_faze = n_sf_fazes.id
   Left Join
  n_products On tsales_funnel_mrecord.Product_type = n_products.Product_Code
  Left Join
  (SELECT * FROM tsales_funnel_comments WHERE Comm_type = 4) as comm On tsales_funnel.ID = comm.Funnel_ID
  Left Join
  wp_users As wp_users02
    On wp_users02.user_login = tsales_funnel_mrecord.Risk_acceptance
WHERE 
tsales_funnel_clients.Tips_Galvenais = 1
";
$error = "Error: the query failed...
    <pre style='width:700px;word-wrap:break-word;white-space:normal;'>$query</pre>";
$result = $wpdb->get_results( $query, ARRAY_A ) or wp_die( $error );
$objPHPExcel = new PHPExcel(); 
$objPHPExcel->getProperties()
        ->setCreator("user")
            ->setLastModifiedBy("user")
        ->setTitle("Office 2007 XLSX Test Document")
        ->setSubject("Office 2007 XLSX Test Document")
        ->setDescription("Test document for Office 2007 XLSX, generated using PHP classes.")
        ->setKeywords("office 2007 openxml php")
        ->setCategory("Test result file");
// Set the active Excel worksheet to sheet 0
$objPHPExcel->setActiveSheetIndex(0); 
// Initialise the Excel row number
$rowCount = 0; 
// Sheet cells
$cell_definition = array(
    'A' => 'ID',
    'B' => 'Darijuma_vaditajs',
    'C' => 'Starpnieks',
    'D' => 'OWCA',
    'E' => 'Produkts',
    'F' => 'Produkta_kods',
    'G' => 'Saņēmšanas_datums',
    'H' => 'Deadline',
    'I' => 'Statuss',
    'J' => 'Klienta_Regnr',
    'K' => 'Klients',
    'L' => 'Faze_date',
    'M' => 'Faze',
    'N' => 'Apdrošīnājuma_summa',
    'O' => 'TRL_skaits',
    'P' => 'Compensa_cena',
    'Q' => 'Tirgus_cena',
    'R' => 'Riska_parakstitajs',
    'S' => 'Aizveršanas_komentārs'
);
// Build headers
foreach( $cell_definition as $column => $value )
    $objPHPExcel->getActiveSheet()->setCellValue( "{$column}1", $value ); 
// Build cells
while( $rowCount < count($result) ){ 
    $cell = $rowCount + 2;
    foreach( $cell_definition as $column => $value )
        $objPHPExcel->getActiveSheet()->setCellValue($column.$cell, $result[$rowCount][$value]); 
    $rowCount++; 
} 
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment;filename="iPortal_Atskaite_'.date('Y-m-d_H.i.s', strtotime('+3 hour')).'.xlsx"');
header('Cache-Control: max-age=0');
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
$objWriter->save('php://output');
exit;

我接收的日期列是YY-MM-DD，这是Excel不支持的。但是我需要:

'G' => 'Saņēmšanas_datums',

格式(YYYY.MM.DD) Like: 2015.12.31

为:

和

'H' => 'Deadline', and 'L' => 'Faze_date',

我需要日期格式(YYYY.MM)。DD HH:MM:SS) Like 2015.12.31 15:31:22

我该怎么做呢?

$dateTimeObject = DateTime::createFromFormat('y-m-d', <date value from database row>, new DateTimeZone('UTC'));

$excelDate = PHPExcel_Shared_Date::PHPToExcel($dateTimeObject);

$objPHPExcel->getActiveSheet()
    ->setCellValue(<cell address>, $excelDate);
$objPHPExcel->getActiveSheet()
    ->getStyle(<cell address>)
    ->getNumberFormat()
    ->setFormatCode('yyyy.mm.dd');