php读取excel日期类型数据的例子

//excel日期转换函数
function excelTime($date, $time = false) {
 if(function_exists('GregorianToJD')){
  if (is_numeric( $date )) {
   $jd = GregorianToJD( 1, 1, 1970 );
   $gregorian = JDToGregorian( $jd + intval ( $date ) - 25569 );
   $date = explode( '/', $gregorian );
   $date_str = str_pad( $date [2], 4, '0', STR_PAD_LEFT )
      ."-". str_pad( $date [0], 2, '0', STR_PAD_LEFT )
      ."-". str_pad( $date [1], 2, '0', STR_PAD_LEFT )
      . ($time ? " 00:00:00" : '');
   return $date_str;
  }
 }else{
  $date=$date>25568?$date+1:25569;
  /*There was a bug if Converting date before 1-1-1970 (tstamp 0)*/
  $ofs=(70 * 365 + 17+2) * 86400;
  $date =  date("Y-m-d",($date * 86400) - $ofs).($time ? " 00:00:00" : '');
 }
 return $date;
}