我希望管理员添加学生费用我使用文本框插入学生姓名 当我确定费用类型时，我使用了多动态列表，费用出现 我使用随机函数作为收据编号。 我有 4 个页面（indexmysqli.php、fetchmysqli.php、insertmysqli.php、 连接mysqli.php）
我有三张桌子
Table structure for table `st_info`
--
CREATE TABLE `st_info` (
`st_id` int(12) NOT NULL AUTO_INCREMENT,
`st_fullname` varchar(100) NOT NULL,
`st_username` varchar(30) NOT NULL,
`st_password` varchar(100) NOT NULL,
`religion` varchar(50) NOT NULL,
`old_school` varchar(100) NOT NULL,
`status` varchar(300) NOT NULL,
`st_grade` int(5) NOT NULL,
`roll_no` int(5) NOT NULL,
`st_dob` varchar(20) NOT NULL,
`st_address` varchar(100) NOT NULL,
`home_no` int(100) NOT NULL,
`st_gender` varchar(12) NOT NULL,
`st_father` varchar(100) NOT NULL,
`st_mother` varchar(100) NOT NULL,
`st_parents_contact` varchar(15) NOT NULL,
`father_job` varchar(100) NOT NULL,
PRIMARY KEY (`st_id`)
) ENGINE=MyISAM AUTO_INCREMENT=14 DEFAULT CHARSET=latin1;
-- Table structure for table `sch_tran`
--
CREATE TABLE `sch_tran` (
`tran_id` int(11) NOT NULL AUTO_INCREMENT,
`Reciept` varchar(100) NOT NULL,
`st_fullname` varchar(100) NOT NULL,
`fee` float NOT NULL,
`fee_type` varchar(100) NOT NULL,
`pay_mode` varchar(20) NOT NULL,
`current_day` date NOT NULL,
PRIMARY KEY (`tran_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Table structure for table `sch_fee`
CREATE TABLE `sch_fee` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`grade` int(11) NOT NULL,
`fee_type` varchar(200) NOT NULL,
`fee` float NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=latin1;
我不知道哪里出了问题，但它不起作用，请帮助我并纠正我的代码
My pages
indexmysqli.php
<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);
include('connectionmysqli.php');
$RCP= generateRandomString($connection);
function generateRandomString($connection) {
$length =5;
$characters = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
$randomString = '';
for ($i = 0; $i < $length; $i++) {
$randomString .= $characters[rand(0, strlen($characters) - 1)];
}
$RCP='RC'.$randomString;
$result=mysqli_query($connection,"select * from
sch_tran where Reciept='$RCP'");
// var_dump($result);
if((mysqli_num_rows($result))!=null){
generateRandomString($connection);
}
return $RCP;
}
$fee_type = '';
$query = $connection->query("SELECT fee_type FROM sch_fee ");
$result = $query->fetch_all(MYSQLI_ASSOC);
foreach($result as $row)
{$fee_type = '<option value="'.$row["fee_type"].'">'
.$row["fee_type"].'</option>';
}
?>
<!DOCTYPE html>
<html>
<head>
<title> Multi Select Box Data using Jquery Ajax PHP</title>
<script src="https://ajax.googleapis.com/ajax/libs
/jquery/3.1.0/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.
bootstrapcdn.com/bootstrap/3.3.6/
css/bootstrap.min.css" />
<script src="https://maxcdn.bootstrapcdn.com
/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="jquery.lwMultiSelect.js"></script>
<link rel="stylesheet" href="jquery.lwMultiSelect.css" />
</head>
<body>
<br /><br />
<div class="container" style="width:600px;">
<h2 align="center">Insert Dynamic Multi Select Box Data
using Jquery Ajax PHP</h2><br /><br />
<form action="indexmysqli.php" method="post" id="insert_data">
<label>Fullname</label>
<input type="text" name="st_fullname" id="st_fullname"
class="form-control action">
<br />
<select name="fee_type" id="fee_type" class="form-control action">
<option value="">Select fee_type</option>
<?php echo $fee_type; ?>
</select>
<br />
<select name="fee" id="fee" class="form-control action">
<option value="">Select fee</option>
</select>
<br />
<label>Pay Mode</label>
<select name="pay_mode" id="pay_mode" class="form-control action">
<option value="">select</option>
<option value="Cash">CASH</option>
<option value="Cheque">CHEQUE</option>
</select>
<br>
Reciept Number: <input type="text" value="<?php echo($RCP); ?>"
name="Reciept" class="form-control action">
<input type="submit" name="insert" id="action"
class="btn btn-info" value="Insert" />
</form>
</div>
</body>
</html>
<script>
$(document).ready(function(){
$('.action').change(function(){
if($(this).val() != '')
{
var action = $(this).attr("id");
var query = $(this).val();
var result = '';
if(action == 'fee_type')
{
result = 'fee';
}
$.ajax({
url:'fetchmysqli.php',
method:"POST",
data:{action:action, query:query},
success:function(data)
{
$('#'+result).html(data);
}
})
}
});
$('#insert_data').on('submit', function(event){
event.preventDefault();
if($('#fee_type').val() == '')
{
alert("Please Select fee_type");
return false;
}
else if($('#fee').val() == '')
{
alert("Please Select fee");
return false;
}
else if($('#st_fullname').val() == '')
{
alert("Please Select st_fullname");
return false;
}
else if($('#Reciept').val() == '')
{
alert("Please Select Reciept");
return false;
}
else if($('#pay_mode').val() == '')
{
alert("Please Select pay mode");
return false;
}
else
{
$('#action').attr('disabled', 'disabled');
var form_data = $(this).serialize();
$.ajax({
url:"insertmysqli.php",
method:"POST",
data:form_data,
success:function(data)
{
$('#action').attr("disabled", "disabled");
if(data == 'done')
{
$('#insert_data')[0].reset();
alert('Data Inserted');
}
}
});
}
});
});
</script>
]
`
获取mysqli
//start
<?php
if(isset($_POST['action']))
{
include('connectionmysqli.php');
$output = '';
if($_POST['action'] == 'fee_type')
{
$query = mysqli_query("
SELECT fee FROM sch_fee
WHERE fee_type = $fee_type");
//$output = '';
//$query = $mysqli->query("SELECT * FROM tbl_comment
//WHERE parent_comment_id = '0'
//ORDER BY comment_id DESC");
$result = mysqli_execute_query(
array(
$fee_type => $_POST["query"]
)
);
//$result = $query->fetch_all(MYSQLI_ASSOC);
// $row = mysqli_fetch_array($result, MYSQLI_ASSOC);
$row = mysqli_fetch_assoc($result);
$output .= '<option value="">Select State</option>';
foreach($result as $row)
{
$output .= '<option value="'.$row["fee"].'">'.$row["fee"].'</option>';
}
echo $output;
}}
?>
插入mysqli.php
<?php
//insert.php
if(isset($_POST['fee_type']))
{
include('database_connection.php');
$connection->query("INSERT INTO sch_tran (st_fullname, fee_type, fee,
Reciept, pay_mode,date)
VALUES($st_fullname,$fee_type, $fee, $Reciept, $pay_mode,$date");
$result = mysqli_execute_query(
array(
$st_fullname => $_POST['st_fullname'],
$Reciept => $_POST['Reciept'],
$fee_type => $_POST['fee_type'],
$fee => $_POST['fee'],
$pay_mode => $_POST['pay_mode'],
$date => date('Y:m:d H:i:s'),
)
);
$result =$query->fetch_all(MYSQLI_ASSOC);
if(isset($result))
{
echo 'done';
}
}
?>
连接mysqli.php
<?php
$connection = mysqli_connect('localhost','root');
mysqli_select_db($connection,'project1');
//$mysqli = new Mysqli("localhost","root","","project1");
?>