我正在尝试为我的快递公司创建一个基本的货运跟踪页面。用户将提供参考号，并且需要查询以从两个表中提取不同列中的数据。下面是 HTML 代码，下面是 php 代码。HTML 工作正常，但是当我提交表单时，php 会抛出一个空白页。谁能告诉我我在这里犯了什么错误。在此先感谢您的帮助。
HTML 代码：
<form action="tracking.php" method="POST" id="insert">
<table>
<tr>
<td>Please enter your 9 digit Docket No:</td>
<td><input type="text" size=9 name="docketno"></td>
</tr>
<tr>
<td colspan=2 id="sub"><input type="submit"onClick="confSubmit(this.form);" name="submit" value="submit" > <input type="reset" value="Reset!"></td>
</tr></Table></form>
PHP代码：
<?php
// contact to database
$connect = mysql_connect('localhost', 'userid', 'password') or die ("Error , check your server connection.");
mysql_select_db("testing", $connect);
//Get data in local variable
$_docketno=$_POST['docketno'];
// check for null values
if ($_docketno=="")
echo "Docket Number must be entered, please hit back button and re-enter Docket Number";
else{
$query = "SELECT shipment_data.docketno, shipment_data.bookingdatetime, shipment_data.customercode, shipment_data.shippername, shipment_data.bookingou, shipment_data.assureddeliverydate, for_delivery_details.deliverydatetime, for_delivery_details.deliverystatus, for_delivery_details.name_and_number_of_the_person_to_whom_del, for_delivery_details.deliveryattemptnumber_1, for_delivery_details.deliveryattemptnumber_2, for_delivery_details.deliveryattemptnumber_3, for_delivery_details.faileddel.attempt,reason_1, for_delivery_details.faileddel.attempt,reason_2, for_delivery_details.faileddel.attempt,reason_3 "
"FROM shipment_data LEFT JOIN for_delivery_details where docketno=".$_POST['docketno'].
"ON shipment_data.docketno = for_delivery_details.docketno";
$result = mysql_query($query) or die(mysql_error());
// Print out the contents of each row into a table
while($row = mysql_fetch_array($result)){
echo Docket Number " - ". $row[docketno];
echo Booking Date Time " - ". $row[bookingdatetime];
echo Customer Code " - ". $row[customercode];
echo Shipper Name " - ". $row[shippername];
echo Booked From " - ". $row[bookingou];
echo Assured Delivery Date " - ". $row[assureddeliverydate];
echo Delivery Date Time " - ". $row[deliverydatetime];
echo Delivery Status " - ". $row[deliverystatus];
echo Name Number to whom delivered " - ". $row[name_and_number_of_the_person_to_whom_del];
echo First Delivery attempt date " - ". $row[deliveryattemptnumber_1];
echo Second Delivery attempt date " - ". $row[deliveryattemptnumber_2];
echo Third Delivery attempt date " - ". $row[deliveryattemptnumber_3];
echo First delivery, fail reason " - ". $row[faileddel.attempt,reason_1];
echo Second delivery, fail reason " - ". $row[faileddel.attempt,reason_2];
echo Third delivery, fail reason " - ". $row[faileddel.attempt,reason_3];
}
?>
MySql 表：
create table if not exists `shipment_data` (
`docketno` int(11) not null,
`referenceno` int(11) default null,
`bookingdatetime` datetime not null,
`customercode` int(11) not null default '9999',
`shippername` varchar(100) not null,
`shipperaddress` varchar(255) not null,
`shipperphone` varchar(12) not null comment 'no special characters like (,),+',
`shipperemail` varchar(50) null default '@',
`consigneename` varchar(100) not null,
`consigneeaddress` varchar(255) not null,
`consigneephone` varchar(12) not null comment 'no special characters like (,),+',
`consigneeemail` varchar(50) null default '@',
`bookingou` varchar(20) not null,
`deliveryou` varchar(20) not null,
`assureddeliverydate` date not null,
`numberofpackages` int(9) not null default '1',
`firststickernum` int(11) not null,
`laststickernum` int(11) not null,
`packagedetails` enum('documents','carton box','gunny bag','wooden box','plastic bag') not null,
`goodstypecode` int(6) not null,
`goodsdescription` varchar(255) not null,
`goodsvalue` decimal(10,0) not null,
`freestoragedays` smallint(6) not null default '1',
`customerinvoiceno` varchar(100) default null,
`waybillnumber` varchar(100) default null,
`servicecode` varchar(255) not null,
`servicedetails` varchar(255) not null,
`riskcoverage` enum('shipper risk','carrier risk') not null,
`length_inches` decimal(10,2) not null default '1.00',
`breadth_inches` decimal(10,2) not null default '1.00',
`height_inches` decimal(10,2) not null default '1.00',
`volumetricweight` double not null comment '((length x breadth x height)/1728)x10',
`actualweight_kg` decimal(10,2) not null default '0.10',
`chargedweight_kg` decimal(10,2) not null default '0.10',
`totalcharge` decimal(10,2) not null default '1.00',
`arrivaldateatdel_ou` datetime default null,
`movementstatus` enum('','in-transit','reached') default null,
`movementid` varchar(75) default null,
primary key (`docketno`)
) engine=innodb default charset=utf8;
create table if not exists `for_delivery` (
`docketno` int(11) not null,
`assureddeliverydate` date not null,
`deliverydatetime` datetime null,
`deliverystatus` enum('','taken for delivery','delivered','undelivered','partial delivery') not null,
`undeliveredfor18hrs_reason` tinytext null,
`adicode` varchar(20) not null,
`adiname` varchar(100) not null,
`adinumber` int(11) not null,
`deliveryattemptnumber_1` datetime null,
`faileddel_attempt_reason_1` varchar(255) null,
`deliveryattemptnumber_2` datetime null,
`faileddel_attempt_reason_2` varchar(255) null,
`deliveryattemptnumber_3` datetime null,
`faileddel_attempt_reason_3` varchar(255) null,
`name_and_number_of_the_person_to_whom_del.` varchar(255) null,
`if_not_the_named_person,_upload_copy_of_identity_proof` blob null,
`first_noticedate` date null,
`first_noticenum` int(11) null comment 'after non-delivery 6 days of arrival at ou',
`second_noticedate` date null,
`second_noticenum` int(11) null comment 'after non-delivery 15 days of arrival at ou',
`third_noticedate` date null,
`third_noticenum` int(11) null comment 'for auction/disposal intimation after non-delivery 30 days of arrival at ou',
primary key(docketno),
foreign key (docketno) references shipment_data(docketno) on delete cascade
) engine=innodb default charset=utf8;