PHP处理时间格式

<?php
header("Content-type: text/html; charset=utf-8");
$txDate = '2016-06-16';
$dateTime = explode('-', $txDate);
$Time = $dateTime[0].$dateTime[1].$dateTime[2];
var_dump($Time);结果：string '20160616' (length=8)
?> $dateTime = explode('-', $params['txDate']);
 $dateTime = $dateTime['0'].$dateTime['1'].$dateTime['2'];var_dump($dateTime); //20160616

<?php
header("Content-type: text/html; charset=utf-8");
$txDate = '2016-06-16';
$dateTime1 = strtotime($txDate); //int 1466028000 将英文文本日期时间解析为 Unix 时间戳：
$dateTime2= date("Y-m-d H:i:s",$dateTime1); //string '2016-06-16 00:00:00' (length=19) Date() 函数把时间戳格式化为更易读的日期和时间。//拼接今日最后时间2016-06-16 23:59:59
$dateTime= date("Y-m-d H:i:s",strtotime(date("Y-m-d",strtotime($dateTime2))."+ 23 hours 59 minutes 59 seconds ")); //string '2016-06-16 23:59:59' (length=19)$sql = select * form `vvt_user` where userid = 100 AND date_time >= $dateTime2 AND date_time <= $dateTime;
?>

$sql .= ' AND UNIX_TIMESTAMP(vvt_repayment.date) >= '.strtotime($day);
$sql .= ' AND UNIX_TIMESTAMP(vvt_repayment.date) <= '.strtotime($endday);