我试图通过PHP避免在SQLite3数据库中自动生成随机数的重复条目。为此，我在do while循环中准备了语句。生成随机数，然后查询检查该数字是否已存在。如果是，则再次生成，如果不是，则继续生成。
至少，这就是我想要实现的目标......
但由于某些我不知道的原因，PHP日志一直向我显示在查询行中已经执行了30秒的最大执行时间。首先，我试着在没有准备好的陈述的情况下完成整个事情并且它没有工作。我以为那是因为我在查询中有php变量。所以我切换到准备好的陈述没有成功。
我通过Firebug检查了所有的POST变量，一切似乎都很好。这是准备好的声明给我腹泻!!
你能帮帮我吗？
PHP代码：
<?php
$adate = $_POST['adate'];
$ddate = $_POST['ddate'];
$ad = $_POST['ad'];
$dd = $_POST['dd'];
$fname = $_POST['fname'];
$lname = $_POST['lname'];
$email = $_POST['email'];
$address = $_POST['address'];
$postal = $_POST['postal'];
$city = $_POST['city'];
$country = $_POST['country'];
$tel = $_POST['tel'];
$message = $_POST['message'];
$price = $_POST['price'];
$bkfst = $_POST['bkfst'];
$rnum = $_POST['rnum'];
$rtype = $_POST['rtype'];
$robotest = $_POST['blnk'];
$bid = 0;
$cid = 0;
$adate = $adate . " 20:00:00";
$ddate = $ddate . " 13:00:00";
if ($robotest)
$error = "You are a gutless robot.";
else {
function bid()
{
$bid = mt_rand(111111, 999999);
if (($bid % 10) == 0) {
$bid = $bid + 123;
}
}
function cid()
{
$cid = mt_rand(11111, 99999);
if (($cid % 10) == 0) {
$cid = $cid + 123;
}
}
include 'connect.php';
do {
cid();
--> $sth = $db->prepare("SELECT COUNT (CustomerID) from Customer WHERE CustomerID = ?");
$sth->execute(array($cid));
} while ($sth->fetchColumn() > 0);
$sth = $db->prepare("INSERT INTO Customer (CustomerID, FirstName, LastName, Address, PostalCode, City, Country, EMail, Phone) VALUES ('$cid', '$fname', '$lname', '$address', '$postal', '$city', '$country', '$email', '$tel')");
$sth->execute();
do {
bid();
--> $sth = $db->prepare("SELECT COUNT (BookingID) from Booking WHERE BookingID = ?");
$sth->execute(array($bid));
} while ($sth->fetchColumn() > 0);
$sth = $db->prepare("INSERT INTO Booking (BookingID, Arrival, Checkout, RoomNumber, CustomerID, Breakfast, Comment, Paid) VALUES ('$bid', '$adate', '$ddate', '$rnum', '$cid', '$bkfst', '$message', 'N')");
$sth->execute();
$subject = "Your Booking";
$message = "Hi $fname,\n\nA $rtype from $ad to $dd has been booked for you.\n\nYour Booking Code is $bid.\n\nRegards.";
mail($email, $subject, $message);
echo 'The Booking completed successfully! Check your E-Mail for further Information.';
}
?>
以 - ＆gt;开头的行在代码中是有问题的行。
是的，我是一个新手，他正在边做边学，并且还在Stack Overflow论坛中通过讨厌的人学习：）
感谢。
编辑：
这就是我的代码现在的样子。所有错误都消失了但是php没有向DB插入任何内容。使用生成的号码正确发送电子邮件。
<?php
$adate = $_POST['adate'];
$ddate = $_POST['ddate'];
$ad = $_POST['ad'];
$dd = $_POST['dd'];
$fname = $_POST['fname'];
$lname = $_POST['lname'];
$email = $_POST['email'];
$address = $_POST['address'];
$postal = $_POST['postal'];
$city = $_POST['city'];
$country = $_POST['country'];
$tel = $_POST['tel'];
$message = $_POST['message'];
$price = $_POST['price'];
$bkfst = $_POST['bkfst'];
$rnum = $_POST['rnum'];
$rtype = $_POST['rtype'];
$robotest = $_POST['blnk'];
$adate = $adate . " 20:00:00";
$ddate = $ddate . " 13:00:00";
$cid;
$bid;
if ($robotest)
$error = "You are a gutless robot.";
else {
function bid()
{
global $bid;
$bid = mt_rand(111111, 999999);
if (($bid % 10) == 0) {
$bid = $bid + 123;
}
}
function cid()
{
global $cid;
$cid = mt_rand(11111, 99999);
if (($cid % 10) == 0) {
$cid = $cid + 123;
}
}
include 'connect.php';
do {
global $cid;
cid();
$sth = $db->prepare('SELECT COUNT (CustomerID) from Customer WHERE CustomerID = ?');
$sth->execute(array($cid));
} while ($sth->fetchColumn() > 0);
global $cid;
$sth = $db->prepare('INSERT INTO Customer (CustomerID, FirstName, LastName, Address, PostalCode, City, Country, EMail, Phone) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)');
$sth->execute(array($cid, $fname, $lname, $address, $postal, $city, $country, $email, $tel));
do {
global $bid;
bid();
$sth = $db->prepare('SELECT COUNT (BookingID) from Booking WHERE BookingID = ?');
} while ($sth->fetchColumn() > 0);
global $bid;
global $cid;
$sth = $db->prepare('INSERT INTO Booking (BookingID, Arrival, Checkout, RoomNumber, CustomerID, Breakfast, Comment, Paid) VALUES (?, ?, ?, ?, ?, ?, ?, ?)');
$sth->execute(array($bid, $adate, $ddate, $rnum, $cid, $bkfst, $message, 'N'));
$subject = "Your Booking";
global $bid;
$message = "Hi $fname,\n\nA $rtype from $ad to $dd has been booked for you.\n\nYour Booking Code is $bid.\n\nRegards.";
mail($email, $subject, $message);
echo 'The Booking completed successfully! Check your E-Mail for further Information.';
}
?>
... hhmmm
答案 0 :(得分：2)
这是一个无限循环：
do {
cid();
$sth = $db->prepare("SELECT COUNT (CustomerID) from Customer WHERE CustomerID = ?");
$sth->execute(array($cid));
} while ($sth->fetchColumn() > 0);
由于您的cid / bid（）函数构造不当，您在此do（）循环中使用的$cid将从不更改您所做的$cid = 0在脚本的顶部。
因此循环开始，您使用CustomerID = 0准备/执行查询，使用您获取的count（）结果返回一行数据。
然后循环再次滚动，你重新执行查询，使用完全相同的$ cid = 0值，所以你继续重置循环终止条件 - 你永远不会得到一个值，因为你继续查询相同的坏/无效的cid = 0。
与旧的BASIC计划差不多一样：10 GOTO 10。
答案 1 :(得分：0)
现在正在运作：
<?php
$adate = $_POST['adate'];
$ddate = $_POST['ddate'];
$ad = $_POST['ad'];
$dd = $_POST['dd'];
$fname = $_POST['fname'];
$lname = $_POST['lname'];
$email = $_POST['email'];
$address = $_POST['address'];
$postal = $_POST['postal'];
$city = $_POST['city'];
$country = $_POST['country'];
$tel = $_POST['tel'];
$message = $_POST['message'];
$price = $_POST['price'];
$bkfst = $_POST['bkfst'];
$rnum = $_POST['rnum'];
$rtype = $_POST['rtype'];
$robotest = $_POST['blnk'];
$adate = $adate . " 20:00:00";
$ddate = $ddate . " 13:00:00";
$cid;
$bid;
if ($robotest)
$error = "You are a gutless robot.";
else {
function bid()
{
global $bid;
$bid = mt_rand(111111, 999999);
if (($bid % 10) == 0) {
$bid = $bid + 123;
}
}
function cid()
{
global $cid;
$cid = mt_rand(11111, 99999);
if (($cid % 10) == 0) {
$cid = $cid + 123;
}
}
include 'connect.php';
$sth = $db->prepare('SELECT COUNT (EMail) from Customer WHERE EMail = ?');
$sth->execute(array($email));
if($sth->fetchColumn() < 1){
do {
global $cid;
cid();
$sth = $db->prepare('SELECT COUNT (CustomerID) from Customer WHERE CustomerID = ?');
$sth->execute(array($cid));
} while ($sth->fetchColumn() > 0);
global $cid;
$sth = $db->prepare('INSERT INTO Customer (CustomerID, FirstName, LastName, Address, PostalCode, City, Country, EMail, Phone) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)');
$sth->execute(array($cid, $fname, $lname, $address, $postal, $city, $country, $email, $tel));
}else{
global $cid;
$sth = $db->prepare('SELECT CustomerID from Customer WHERE EMail = ?');
$sth->execute(array($email));
$id = $sth->fetch(PDO::FETCH_ASSOC);
$cid = $id['CustomerID'];
}
do {
global $bid;
bid();
$sth = $db->prepare('SELECT COUNT (BookingID) from Booking WHERE BookingID = ?');
} while ($sth->fetchColumn() > 0);
global $bid;
global $cid;
$booktime = date('Y-m-d H:i:s');
$sth = $db->prepare('INSERT INTO Booking (BookingID, Arrival, Checkout, RoomNumber, CustomerID, Breakfast, Comment, Paid, BookTime, Invoice) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)');
$sth->execute(array($bid, $adate, $ddate, $rnum, $cid, $bkfst, $message, 'N', $booktime, NULL));
$subject = "Your Booking";
global $bid;
$message = "Hi $fname,\n\nA $rtype from $ad to $dd has been booked for you.\n\nYour Booking Code is $bid.\n\nMention this Code if you need to get in touch with us.\n\nRegards.";
mail($email, $subject, $message);
echo 'The Booking completed successfully! Check your E-Mail for further Information.';
}
?>
没有线索，如果这是最好的方法，但它工作得很好。
感谢所有提示。