【发布时间】：2018-02-10 16:07:21
【问题描述】：
我正在尝试在插入之前检查数据库中的输入。但是，它在父表中插入了多个 id。它假设插入多个具有相同父 ID 的子父。我有 3 个子表，toto_number、damacai_number 和 magnum_number。你可以看看我提供的图片。我试图在插入之前检查数据库中的输入。这意味着它在插入数据库之前检查数字的可用性
界面视图
插入.php 文件
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "2d_system";
$conn = new mysqli($servername, $username, $password, $dbname);
foreach ($_POST['gamecenter'] as $key => $value) { // all game centers will be looped here
$gamecenter = $_POST['gamecenter'][$key];
$number = $_POST['number'][$key];
$price = $_POST['price'][$key];
$result = mysqli_query($conn, "SELECT * FROM number_availability WHERE Number = '" . $number . "' AND GameCenter = '" . $gamecenter . "'");
$row = mysqli_fetch_assoc($result);
try {
if ($row['Availability'] > 0) {
if ($conn->query("INSERT INTO lottery_ticket(CreatedDateTime) VALUES (now())")) { // consider adding a default value of CURRENT_TIMESTAMP for CreatedDateTime
$lotteryTicketID = $conn->insert_id;
// foreach ($_POST['gamecenter'] as $k => $v) { // all game centers will be looped here
//$gamecenter = $_POST['gamecenter'][$k]; // make sure you need this, if the values are incorrect, then consider using
// $gamecenter = $v;
if ($stmt = $conn->prepare("INSERT INTO " . strtolower($gamecenter) . "_draw (LotteryId, " . $gamecenter . "_Number, Price) VALUES (?, ?, ?)")) { // This part is done to avoid creating so many duplicated queries and and shorten the code.
$number = $_POST['number'][$key];
$price = $_POST['price'][$key];
$stmt->bind_param('idd', $lotteryTicketID, $number, $price); // be careful with these values. If you change the name of your tables or columns, these might be affected.
$stmt->execute();
// }
if ($conn->errno) {
throw new Exception("Error: could not execute query/queries: " . $conn->error);
}
}
}
}
if ($conn->errno) {
throw new Exception("Error: could not execute query/queries: " . $conn->error);
}
echo "Records added successfully.";
}
catch (Exception $e) {
echo $e->getMessage();
}
}
$conn->close();
?>
//index.php
<?php
?>
<!DOCTYPE html>
<html>
<head>
<title>2D</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>
</head>
<body>
<br />
<div class="container">
<br />
<h4 align="center">Enter Number Details</h4>
<br />
<form method="post" id="insert_form" action="test3.php">
<div class="table-repsonsive">
<span id="error"></span>
<table class="table table-bordered" id="item_table">
<tr>
<th>2D Number</th>
<th>Price (RM)</th>
<th>Game Center</th>
<th><button type="button" onclick="" name="add" class="btn btn-success btn-sm add"><span class="glyphicon glyphicon-plus"></span></button></th>
</tr>
</table>
<div align="center">
<input type="submit" name="submit" class="btn btn-info" value="Check Number" />
</div>
</div>
</form>
</br>
</div>
</body>
</html>
<script>
$(document).ready(function(){
$(document).on('click', '.add', function(){
var html = '';
html += '<tr>';
html += '<td><input type="text" name="number[]" value="" class="form-control item_name" /></td>';
html += '<td><input type="text" name="price[]" class="form-control item_quantity" /></td>';
html += '<td><select name="gamecenter[]" class="form-control item_unit"><option value="">Select Unit</option><option value="Damacai">Damacai</option><option value="Magnum">Magnum</option><option value="Toto">Toto</option></select></td>';
html += '<td><button type="button" name="remove" class="btn btn-danger btn-sm remove"><span class="glyphicon glyphicon-minus"></span></button></td></tr>';
$('#item_table').append(html);
});
$(document).on('click', '.remove', function(){
$(this).closest('tr').remove();
});
$('#insert_form').on('submit', function(event){
event.preventDefault();
var error = '';
$('.number').each(function(){
var count = 1;
if($(this).val() == '')
{
error += "<p>Enter Item Name at "+count+" Row</p>";
return false;
}
count = count + 1;
});
$('.price').each(function(){
var count = 1;
if($(this).val() == '')
{
error += "<p>Enter Item Quantity at "+count+" Row</p>";
return false;
}
count = count + 1;
});
$('.gamecenter').each(function(){
var count = 1;
if($(this).val() == '')
{
error += "<p>Select Unit at "+count+" Row</p>";
return false;
}
count = count + 1;
});
var form_data = $(this).serialize();
if(error == '')
{
$.ajax({
url:"insert.php",
method:"POST",
data:form_data,
success:function(data){
$(document.body).append(data);
}
});
}
else
{
$('#error').html('<div class="alert alert-danger">'+error+'</div>');
}
});
});
</script>【问题讨论】：