如何根据数据库中的值生成下拉菜单的选择？

Question

这是我正在努力实现的目标的照片

http://oi60.tinypic.com/b9gf20.jpg

这是我所有的代码...

PHP 文件：contact_form.php

<?php

define('DB_NAME', 'xxx');
define('DB_USER', 'xxx');
define('DB_PASSWORD', 'xxx');
define('DB_HOST', 'xxx');

$connection = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD);

if(!$connection){
    die('Database connection failed: ' . mysqli_connect_error());
}

$db_selected = mysqli_select_db($connection, DB_NAME);

if(!$db_selected){
    die('Can\'t use ' .DB_NAME . ' : ' . mysqli_connect_error());
}

echo 'Connected successfully';

if (isset($_POST['itemname'])){
    $itm = $_POST['itemname'];
}else{
    $itm = '';
}    

if($_POST['mile']){
    $mi = $_POST['mile'];
}else{
    echo "Miles not received";
    exit;
}

if($_POST['email']){
    $email = $_POST['email'];
}else{
    echo "email not received";
    exit;
}

$sql = "INSERT INTO seguin_orders (itemname, mile, email) VALUES ('$itm', '$mi', '$email')";
if (!mysqli_query($connection, $sql)){
    die('Error: ' . mysqli_connect_error($connection));
}

联系方式：formz.php

<html>
<header>



</header>

<body>

<form action="/demoform/contact_form.php" class="well" id="contactForm" method="post" name="sendMsg" novalidate="">

<big>LOAD PAST ORDERS:</big>
<select id="extrafield1" name="extrafield1">
<option value="">Please select...</option>
</select>

</br>

<input type="text" required id="mile" name="mile" placeholder="Miles"/>

</br>

<input id="email" name="email" placeholder="Email" required="" type="text" value="demo@gmail.com" readonly="readonly"/>

</br>

<input id="name" name="itemname" placeholder="ITEM NAME 1" required="" type="text" />

</br>

<input type="reset" value="Reset" />


<button type="submit" value="Submit">Submit</button>


</form>


</body>


</html>

非常感谢和感谢任何时间和帮助，谢谢。

Answer 1

当您单击 select 时，然后将 ajax 请求发送到另一个 php 脚本到 select 数据库关于您想要的列；然后更改它；像这样:

 <input name="email" />
 <select onclick="ajaxFunc();" name="sel">
 </select>
 <script>
 function ajaxFunc(){
 var mail = $("input[name='email']").val();
 $.post('anotherFile.php',{mail:mail},function(e){
 $("select[name='sel']").append(e);
 });
 }
 </script>

Answer 2

<form>
    <?php 
        while ($row = mysqli_fetch_assoc($result)) 
        {
         echo '<option value =" ' . $row['column'] . ' ">' . $row['column'] . '</option>';
        };
    ?>
 </form>

如何根据数据库中的值生成下拉菜单的选择？

How can I generate selections for a dropdown menu based on values in my database?

php

forms

jquery

mysqli

drop-down-menu

PHP 文件：contact_form.php

联系方式：formz.php