从php中的mysql查询中获取日期

Question

我有一个mysql数据库。 我有一个PHP脚本，连接到我的数据库。我的数据库包含3个表，错误，日期，电子邮件地址，根据屏幕截图

我的php查询如下：

<?php

mysql_connect("localhost", "username", "password") or die(mysql_error());
mysql_select_db("pmta_reporting") or die(mysql_error());

$result = mysql_query("SELECT * FROM microcompany WHERE date='2013-01-28' AND code='2.0.0'") or die(mysql_error());
$count= mysql_num_rows($result);
echo $count;

mysqli_close($con);
?>

我想用昨天的日期和格式Y-m-d替换'2013-01-28'。 我怎么能这样做？

任何反馈都将不胜感激

Answer 1

$yesterday = date("Y-m-d", strtotime('-1 day'));
$result = mysql_query("SELECT * FROM microcompany WHERE date='$yesterday' AND code='2.0.0'") or die(mysql_error());

Answer 2

为什么不使用MySQL功能？它们应该用在MySQL中。

SELECT * FROM microcompany WHERE date=DATE(DATE_SUB(NOW(), INTERVAL 1 DAY)) AND code='2.0.0'

顺便说一句。不推荐使用mysql- *函数：http://www.php.net/manual/en/function.mysql-query.php

Answer 3

$date = new DateTime('Yesterday');
echo $date->format('Y-m-d');

或者

$date = new DateTime('2013-01-28');
$date->modify('-1 day');
echo $date->format('Y-m-d');

仅供参考，you shouldn't use mysql_* functions in new code。它们不再被维护and are officially deprecated。请参阅red box？转而了解prepared statements，并使用PDO或MySQLi - this article将帮助您确定哪个。如果您选择PDO here is a good tutorial。

Answer 4

$date = new DateTime('Yesterday');
$fdate = $date->format('Y-m-d');
echo $fdate;

Answer 5

为此目的使用本机mysql函数。

$result = mysql_query("SELECT * FROM microcompany WHERE
date=date_sub(date(now()), interval 1 day) AND code='2.0.0'")
or die(mysql_error());

Answer 6

<?php

$yesterday = date('Y-m-d', strtotime('-1 day',strtotime(date("y-m-d")) ));

$query = "SELECT * FROM microcompany WHERE date='".$yesterday."' AND code='2.0.0'";

$newQuery = 'update microcompany set date = "'.$yesterday.' where date = "'.$oldDate.'" and code ="2.0.0"';
?>