[英]How to get ID of item from database in <select><option> Tag
你好。 我對更難的代碼有問題,但在這里我試圖簡化它只是為了問一個問題......我在數據庫中有 3 個表:cars(cars_id,model),customers(customer_id,name,surname),sales (sales_id,customer_id,cars_id)。而且我不知道如何在選擇選項標簽中獲取所選選項的 ID。 例如,對於 BMW X6,我想獲得 ID = 2 並將此值放在 SALES 表的 cars_id 列中以避免數據冗余。 這是關系。 CARS 表中的cars_id 與SALES 表中的cars_id 相同。 但我想使用 PHP MySQL 來做到這一點。
<?php
//index.php
$connect = new PDO("mysql:host=localhost;dbname=store", "root", "");
function fill_unit_select_box($connect)
{
$output = '';
$query = "SELECT * FROM cars";
$statement = $connect->prepare($query);
$statement->execute();
$result = $statement->fetchAll();
foreach($result as $row)
{
$output .= '<option value="'.$row["model"].'">'.$row["model"].'</option>';
}
return $output;
}
?>
<html>
<head>
<title>Sales form</title>
<script src="jquery-3.5.0.min.js" defer></script>
<link rel="stylesheet" href="bootstrap.min.css" />
<script src="jquery-3.5.0.min.js"></script>
</head>
<body>
<div class="container">
<h3 align="center">Sales form</h3><br />
<form method="post" id="insert_form">
<div class="table-repsonsive">
<span id="error"></span>
<table class="table table-bordered" id="item_table">
<tr>
<th >sales</th>
<th >customer</th>
<th >cars</th>
<th><button type="button" name="add" class="btn btn-success btn-sm add"><span class="glyphicon glyphicon-plus">Add</span></button></th>
</tr>
</table>
<div align="center">
<input type="submit" name="submit" class="btn btn-info" value="Send" />
</div>
</div>
</form>
</div>
</body>
</html>
<script>
$(document).ready(function(){
$(document).on('click', '.add', function(){
var html = '';
html += '<tr>';
html += '<td class="lp"></td>';
html += '<td><input type="text" name="customers_name[]"></td>';
html += '<td><select style="backbround-color:white;"name="cars_name[]" class="form-control size_id"><option value=""><?php echo fill_unit_select_box($connect); ?></option></select></td>';
html += '<td><button type="button" name="remove" class="btn btn-danger btn-sm remove"><span class="glyphicon glyphicon-minus">Usuń</span></button></td></tr>';
$('#item_table').append(html);
var count=0;
$('.lp').each(function(){
count=count+1;
$(this).text(count);
});
});
$('#insert_form').on('submit', function(event){
event.preventDefault();
var form_data = $(this).serialize();
if(error == '')
{
$.ajax({
url:"insert.php",
method:"POST",
data:form_data,
success:function(data)
{
if(data == 'ok')
{
$('#item_table').find("tr:gt(0)").remove();
$('#error').html('<div class="alert alert-success">Dane zostały wysłane</div>');
}
}
});
}
else
{
$('#error').html('<div class="alert alert-danger">'+error+'</div>');
}
});
});
</script>
<?php
//insert.php;
session_start();
if(isset($_POST["customers_name"]))
{
$connect = new PDO("mysql:host=localhost;dbname=store", "root", "");
for($count = 0; $count < count($_POST["customers_name"]); $count++)
{
$query = "INSERT INTO sales
(customer_id,cars_id)
VALUES (:customer_id,:cars_id)
";
$statement = $connect->prepare($query);
$statement->execute(
array(
':customer_id' => $_POST["customers_name"][$count],
':cars_id' => $_POST["cars_name"][$count],
)
);
}
$result = $statement->fetchAll();
if(isset($result))
{
echo 'ok';
}
}
?>
所以,你只需要像這樣編輯你的 $output 。 value="'.$row["model"] 到 value="'.$row["cars_id"] 更改為 cars_id 僅用於值,因此用戶可以看到名稱,但您會在表單提交時獲得 id。
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