PHP：在今天/昨天之前进行过滤

Question

我在这里有一个过滤器：

$today = time() - (3600*24);
$Yday = time() - (3600*48);


$getMsgsToday = mysql_query("SELECT * FROM users_msgs WHERE uID = '$USER' AND date > $today ORDER by date DESC LIMIT 10");


$getMsgsYday = mysql_query("SELECT * FROM users_msgs WHERE uID = '$USER' AND date BETWEEN $Yday AND $today ORDER by date DESC LIMIT 10");

哪个不能正常工作。 如果时间为01:00，则会在昨天的“今天”下方显示您的日期，例如23：00、22：00、21：00，并且在“昨天”之后的第二天（凌晨01:00以后）首先显示您。

我该如何解决这个问题，以便在正确的时间进行？ 所以今天是00:01，昨天是23:59。我想我只做time（）-（3600 * 24）做错了。我该怎么办？

Answer 1

无需在PHP中计算这些东西，而在SQL本身中完成。

-- Today's messages: round the "date" field to be only a date, not a timestamp, then compare
$getMsgsToday = mysql_query("SELECT * FROM users_msgs WHERE uID = '$USER' AND cast(`date` as date) = cast(now() as date) ORDER by date DESC LIMIT 10");

-- Yesterday's messages: round the "date" field to be only a date, then compare to today - 1 day
$getMsgsYday = mysql_query("SELECT * FROM users_msgs WHERE uID = '$USER' AND cast(`date` as date) = date_sub(cast(now() as date), interval 1 day) ORDER by date DESC LIMIT 10");

无论如何，大多数数据库中的日期操作函数都比PHP更易于使用，因此您不必费劲：)

Answer 2

您可能会收到错误消息，因为昨天我们有DST。 使用下面的代码，这已被考虑在内。 您永远不要自己计算时间戳。 容易出错。

$now       = time();                 // gives timestamp of right now
$today     = strtotime('today')      // gives timestamp of today 00:00
$yesterday = strtotime('yesterday'); // gives timestamp for yesterday 00:00
$ts24hago  = strtotime('-24 hours'); // gives timestamp 24 hours ago

我同意El Yobo的观点，即使用MySql更容易做到这一点。

Answer 3

time（）将基于当前的第二个时间戳记，在此您需要当前/前几天的开始时间。 我建议使用mktime代替，php站点上有很多示例。

Answer 4

$today = date('Y-m-d',time());
$yesterday = date('Y-m-d',time() - 3600);

Answer 5

$today_start = strtotime(date('Y-m-d 00:00:00'));
$today_end = strtotime(date('Y-m-d 23:23:59'));
$yesterday_end = $today_start - 1;
$yesterday_start = $yesterday_end - 86399;

Answer 6

我想你想要这个。 希望我能帮助你...

//Date format(YYYY-MM-DD) change to timestamp 
function getTS($date){
    if (false ===preg_match('/\d{4}-\d{2}-\d{2}/i', $date))
        return 0;
    list($year,$month,$day) = explode('-',$date);
    return mktime(0,0,0,$month,$day,$year);
}
//Get Today and Yesterday Timestamp.
$today = getTS(date('Y-m-d'));
$Yday = getTS(date('Y-m-d',strtotime('yesterday')));

应用sql脚本。

$getMsgsToday = mysql_query("SELECT * FROM users_msgs WHERE uID = '{$USER}' AND date > {$today} ORDER by date DESC LIMIT 10");

$getMsgsYday = mysql_query("SELECT * FROM users_msgs WHERE uID = '{$USER}' AND date BETWEEN {$Yday} AND {$today} ORDER by date DESC LIMIT 10");