[英]how to find whether the a particular date lies between two dates from the database?
<?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";
}
?>
pudate和dodate是數據庫中的日期。 當我嘗試運行時,始終向我顯示輸出,因為車輛不可用。 我正在運行查詢st,檢查這兩天之間是否已經預訂了汽車(如果已經預訂了汽車),它將說汽車不可用,但是無論我如何嘗試運行查詢,它總是會給我相同的結果。
您未能獲得查詢的實際結果。 實際上,您兩次調用mysql_query()
(返回一個handle )。 在您的情況下,請使用mysql_num_rows()
獲取行數,該行數將告訴您該載具是否可用。
問題是您沒有正確處理查詢結果。 要解決此問題,您可以嘗試執行以下操作:
$result = mysql_query("SELECT * FROM reservation WHERE ('pudate'>".$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
}
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