在PHP中获取系统当前日期,但是和数据库中date类型数据匹配出问题。
$link=mysql_connect('localhost','root','root');
if(!$link){
die('连接失败'.mysql_error());
}
//echo "详细的日期及时间:".date("Y-m-d H:i:s");
$day=date("Y-m-d"); //读取当前时间
echo $day. "
";
//$day1=datatime($day);
mysql_select_db('pm25',$link)or die('pm25'.mysql_error());
$result=mysql_query("select * from ceshi where data='day'");
echo '
PM2.5的值 | 日期 | 时间 | ';
---|
'.$data.' | ';
mysql_free_result($result);
mysql_close($link);
但是页面没有查询的结果:
回复讨论(解决方案)
$result=mysql_query("select * from ceshi where data='day'");
应为
$result=mysql_query("select * from ceshi where data=' $day'");
谢谢,解决了,但是我想问想要截取系统当前时间为整点怎么截取?如当前时间为17:56:00,但是我要17:00:00,
date("H:00:00")
谢谢,但是在获取当前时间的情况下时间上的加减,怎么写?
$day=date("Y-m-d")+1;
结果就不是日期类型的了

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