我已经尝试了2天，但没有成功。我正在尝试对照数据库“预订”表中名为“日期”的列中的现有值来检查表单输入值。如果找到任何匹配项，则整个结果必须为false，以便查询不会运行。
我的代码如此杂乱无章，但我现在展示的是唯一可以使一半有效的想法。 用户选择日期或日期范围。将对照数据库中“日期”列中的日期检查这些日期。如果存在任何日期，则整个过程都必须为false；如果找不到任何日期，则必须为true，然后可以将这些值保存到数据库中。 这是我所拥有的：
$sql = "
SELECT date
FROM bookings
;";
$result = $conn->query($sql);
$alreadyBooked = array();
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
$alreadyBooked[] = $row['date'];
} // while
} // num rows
if(isset($_POST['submit'])){
$name = $_POST['name'];
$email = $_POST['email'];
$tel = $_POST['tel'];
$arrive = strtotime($_POST['arrive']);
$depart = (strtotime($_POST['depart'])) - 86400;
?>
<p>You have chosen the following dates: </p>
<a name="booking-form"></a>
<?php
for ( $i = $arrive; $i <= $depart; $i = $i + 86400 ) {
echo $bookedDates = date('Y-m-d', $i );
if (in_array($bookedDates, $alreadyBooked)){
$bookdedDatesNice = date('D, j M Y', strtotime($bookedDates));
echo 'This date is not available : '.$bookdedDatesNice.'<br />';
} else {
echo 'Your dates are available';
$sqlinsert = "INSERT INTO bookings (name, email, tel, roomid, date) values ";
// Loop between timestamps, 24 hours at a time
for ( $i = $arrive; $i <= $depart; $i = $i + 86400 ) {
$bookedDates =date('Y-m-d', $i );
// Constructing the insert query
$sqlinsert .= " ('$name', '$email', '$tel', '$roomId', '$bookedDates'),";
}
$bulk_insert_query = rtrim($sqlinsert, ","); // to remove last comma
$resultinsert = $conn->query($bulk_insert_query);
?>
<p>Your booking has been received for: <br />
Please wait for a confirmation email on: <?php echo $email; ?>
</p>
<?php
// header('refresh:3; url=book.php?id='.$id.'#booking-form');
}// if
} // for
}
Please can someone help out by showing me an example code of how to solve this issue. I am still a newbie at PHP.
答案 0 :(得分：0)
发出一个SQL请求，将响应填充到一个数组中（您已经做过），创建一个将数组作为参数的函数。
function checkDate($dates){ //dates is the array you get from your SQL
foreach($dates as $date){
if($_POST['date'] == $date){
return false;
}
}
return true;
}
如果您对该功能的判断是正确的，则可以将该日期输入数据库，如果为假，则您已经预订了该日期。
答案 1 :(得分：0)
我不知道如何将插入代码更改为准备好的语句，因为我在互联网上发现了这种批量插入代码，说实话也不知道如何将其转换为准备好的语句。
我设法弄清楚了：
<?php
$sql = "
SELECT date
FROM bookings
WHERE roomid = $roomId;
;";
$result = $conn->query($sql);
$alreadyBooked = array();
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
$alreadyBooked[] = $row['date'];
} // while
} // num rows
if(isset($_POST['submit'])){
$name = $_POST['name'];
$email = $_POST['email'];
$tel = $_POST['tel'];
$arrive = strtotime($_POST['arrive']);
$depart = (strtotime($_POST['depart'])) - 86400;
?>
<a name="booking-form"></a>
<h2>Viewing <?php echo $roomname; ?></h2>
<h3>You have chosen the following dates: </h3>
<?php
// show which dates the user chose
for ( $i = $arrive; $i <= $depart; $i = $i + 86400 ) {
echo $bookedDatesecho = date('D, j M Y', $i ).'<br />';
}
// save the dates the user chose into an array
for ( $i = $arrive; $i <= $depart; $i = $i + 86400 ) {
$bookedDates[] = date('Y-m-d', $i );
}
// checking dates chosen from form with dates in the database
$compareDateResult = array_intersect($alreadyBooked,$bookedDates);
// if statement to check whether the dates chosen are available or not and then do something
if (empty($compareDateResult)){
// save booking to the database
$sqlinsert = "INSERT INTO bookings (name, email, tel, roomid, date) values ";
// Loop between timestamps, 24 hours at a time
for ( $i = $arrive; $i <= $depart; $i = $i + 86400 ) {
$bookedDates =date('Y-m-d', $i );
// Constructing the insert query
$sqlinsert .= " ('$name', '$email', '$tel', '$roomId', '$bookedDates'),";
}
$bulk_insert_query = rtrim($sqlinsert, ","); // to remove last comma
$resultinsert = $conn->query($bulk_insert_query);
?>
<p>Your booking has been received for: <br />
Please wait for a confirmation email on: <?php echo $email; ?></p>
<?php
} else { ?>
<h3>These dates are not available:</h3>
<?php
foreach ($compareDateResult as $value) {
//echo 'the date: '.$value.' <br />';
$value2 = strtotime($value);
echo date('D, j M Y',$value2).'<br />';
} // foreach
?>
<p><a href="book.php?id=<?php echo $id; ?>">Please try again</a></p>
<?php
} // if
} else { ?>
<h2>Booking Form</h2>
<form id="booking-form" method="post" action="#booking-form" />
<input type="hidden" name="<?php echo $roomId; ?>" />
<label>Name</label><br />
<input type="text" name="name" required />
<div class="clear20"></div>
<label>Email</label><br />
<input type="email" name="email" required/>
<div class="clear20"></div>
<label>Telephone</label><br />
<input type="text" name="tel" required />
<div class="clear20"></div>
<label>Arrive on: </label>
<input type="date" name="arrive" required/> at 2pm
<div class="clear20"></div>
<label>Depart on: </label>
<input type="date" name="depart" required/> at noon
<div class="clear20"></div>
<input type="submit" name="submit" value="Book »"/>
</form>
<?php } ?>