// 格式化日期
static function formatDate($format, $datetime, $week = 0) {
$datetime = $datetime > 3000 ? $datetime : strtotime($datetime);
if ($week) {
$weeknames = [
'日',
'一',
'二',
'三',
'四',
'五',
'六'
];
$format = str_replace('w', $weeknames [date('w', $datetime)], $format);
}
return date($format, $datetime);
}











