date code in php displaying 01/01/1970

시간관련 함수에서 해당 날짜함수에 초를 더하는것인데 날짜가 1970 01 01 로만 먹혀서 검색해보니깐 

date('Y-m-d 08:00:00', $sDoDay); 대신 $testdate = date('Y-m-d 08:00:00',  strtotime($sDoDay)); 를 써야 먹힌다 

$sDoDay = date('Y-m-d');

var_dump($sDoDay);

//          $testdate = date('Y-m-d 08:00:00', $sDoDay);

         $testdate = date('Y-m-d 08:00:00',  strtotime($sDoDay));

         var_dump($testdate); exit;

http://stackoverflow.com/questions/6263615/date-code-in-php-displaying-01-01-1970