Php 如何从数据库中找出某个特定日期是否介于两个日期之间?
您未能获取查询的实际结果。实际上,您需要调用两次Php 如何从数据库中找出某个特定日期是否介于两个日期之间?,php,mysql,date,Php,Mysql,Date,您未能获取查询的实际结果。实际上,您需要调用两次mysql\u query()(它返回一个句柄)。在您的情况下,使用mysql\u num\u rows()获取行数,这将告诉您车辆是否可用。问题在于您没有正确处理查询结果。要解决此问题,您可以尝试以下方法: <?php $hostname = "localhost"; $db_user = "root"; $db_password = ""; $database = "rentcar"; $db_table = "r
mysql\u query()
(它返回一个句柄)。在您的情况下,使用mysql\u num\u rows()
获取行数,这将告诉您车辆是否可用。问题在于您没有正确处理查询结果。要解决此问题,您可以尝试以下方法:
<?php
$hostname = "localhost";
$db_user = "root";
$db_password = "";
$database = "rentcar";
$db_table = "reservation";
$db = mysql_connect($hostname, $db_user, $db_password);
mysql_select_db($database,$db);
$date1 = $_POST['datepicker1'];
$date2 = $_POST['datepicker2'];
$start_date = strtotime($date1);
$end_date = strtotime($date2);
$query = mysql_query("SELECT * FROM reservation WHERE ('pudate'>".$start_date." AND
'dodate'<".$end_date.") OR ('pudate'<".$start_date." AND 'dodate'>".$end_date." ) OR
('pudate'<".$end_date." AND 'dodate'>".$end_date.") OR ('pudate'<".$start_date." AND
'dodate'>".$start_date." )");
$result = mysql_query($query);
if ($result)
{
echo "vehicle is available";
}
else
{
echo "vehicle is not available";
}
?>
$result=mysql\u query(“从预订中选择*”('pudate'>“$start\u date.”和
“dodate”你能用现实世界的术语解释这些条件应该如何运作吗?另外,你可能想养成编写查询的习惯,这样它们在代码中更容易阅读。它会检查我的取车日期是否在开始日期和结束日期之间,或者我的下车日期是否在开始日期和结束日期之间e它将显示该车不可用,否则,如果不可用,则它将显示该车可用它将显示以下错误mysql\u num\u rows():在第40行的C:\wamp\www\rentcar\search\u result.php中,提供的参数不是有效的mysql结果资源
$result = mysql_query("SELECT * FROM reservation WHERE ('pudate'>".$start_date." AND
'dodate'<".$end_date.") OR ('pudate'<".$start_date." AND 'dodate'>".$end_date." ) OR
('pudate'<".$end_date." AND 'dodate'>".$end_date.") OR ('pudate'<".$start_date." AND
'dodate'>".$start_date." )");
while ($row = mysql_fetch_array($result, MYSQL_NUM)) {
//$row contains the results of your query
}