Question

我正在制作一个网络应用程序，以帮助确定轮到我在办公室泡茶，让我专注于学习PHP / MySQL的使用。为新手无知道歉。

对于注册的新用户，我需要使用下拉列表中的选项填充用户表，该下拉列表本身是从单独的表填充的。因此，当用户注册时，我希望他们从下拉菜单/饮料表中选择他们喜欢的饮品的名称，并且我希望将该饮料的ID保存在用户表的defaultdrink字段中。我也明白这应该用POST来完成，而不是GET。

到目前为止，我们成功地制作了一个填充数据库的表单，并从数据库填充了一个下拉列表 - 但是两者都没有成功。

表单页面是......

   <?php 
require "insert_dropdown.php";
?>

<table width="300" border="0" align="center" cellpadding="0" cellspacing="1">
<tr>
<td><form name="form1" method="post" action="insert_ac.php">
<table width="100%" border="0" cellspacing="1" cellpadding="3">
<tr>
<td colspan="3"><strong>Sign up to the Tea App</strong></td>
</tr>

<tr>
<td width="71">Name</td>
<td width="6">:</td>
<td width="301"><input name="name" type="text" id="name"></td>
</tr>


<tr>
<td colspan="3" align="center"><input type="submit" name="Submit" value="Submit"></td>
</tr>

</table>
</form>
</td>
</tr>
</table>

<?php
$dropdown = "<select name='drinkname'>";
while($row = mysql_fetch_assoc($dresult)) {
  $dropdown .= "\r\n<option value='{$row['drinkname']}'>{$row['drinkname']}</option>";
}
$dropdown .= "\r\n</select>";
echo $dropdown;
?>

表单操作由insert_ac.php ...

引导

<?php

$host=""; // Host name 
$username=""; // Mysql username 
$password=""; // Mysql password 
$db_name="tea"; // Database name 
$tbl_name="users"; // Table name

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// Get values from form 
$name=$_POST['name'];
$pref=$_POST['pref']; // Drink preference


// Insert data into mysql 
$sql="INSERT INTO $tbl_name(name, pref)VALUES('$name', '$pref')";
$result=mysql_query($sql);

// if successfully insert data into database, displays message "Successful". 
if($result){
echo "Successful";
}

else {
echo "ERROR";
}

// close connection 
mysql_close();
?>

我正在使用insert_dropdown.php ...

填充下拉列表

<?php

$host=""; // Host name 
$username=""; // Mysql username 
$password=""; // Mysql password 
$db_name="test"; // Database name 


// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// Write out our query.
$dquery = "SELECT drinkname FROM drinks";
// Execute it, or return the error message if there's a problem.
$dresult = mysql_query($dquery) or die(mysql_error());

// if successfully insert data into database, displays message "Successful". 
if($dresult){
echo "Drink Successful";
echo "<BR />";
}

else {
echo "ERROR";
}

// close connection 
mysql_close();
?>

我是否超越拯救？

干杯，

亚历

Answer 1

不要关闭mysql连接或者 - 甚至更好 - 将实际的数据库行存储到数组中并使用该数组填充下拉列表并将您的选择框放在表单内。

好吧，如果你想要学习有用而简单的东西

的config.php

<?php
$host=""; // Host name 
$username=""; // Mysql username 
$password=""; // Mysql password 
$db_name="tea"; // Database name 

// Connect to server and select database.
mysql_connect($host, $username, $password); 
mysql_select_db($db_name);

// A function! greatest invention since wheel.
function dbgetarr($query){
  $a   = array();
  $res = mysql_query($query);
  if (!$res) {
    trigger_error("dbget: ".mysql_error()." in ".$query);
  } else {
    while($row = mysql_fetch_assoc($res)) $a[]=$row;
  }
  return $a;
}

主页。

<?php
include 'config.php';
$data = dbGetArr("SELECT drinkname FROM drinks");
$tpl = 'tea.tpl.php';
include 'main.tpl.php';

主要网站模板main.tpl.php

<html>
<body>
<?php include $tpl ?>
</body>
</html>

茶页模板tea.tpl.php

<table width="300" border="0" align="center" cellpadding="0" cellspacing="1">
<tr>
<td><form name="form1" method="post" action="insert_ac.php">
<table width="100%" border="0" cellspacing="1" cellpadding="3">
<tr>
<td colspan="3"><strong>Sign up to the Tea App</strong></td>
</tr>

<tr>
<td width="71">Name</td>
<td width="6">:</td>
<td width="301"><input name="name" type="text" id="name"></td>
</tr>
<tr>
  <td width="71">Name</td>
  <td width="6">:</td>
  <td width="301"><input name="drink" type="text" id="name">
    <select name="drinkname">
<?php foreach($data as $row)): ?>
      <option value="<?=$row['drinkname']?>"><?=$row['drinkname']?></option>
<?php endforeach ?>
    </select>
  </td>
</tr>
<tr>
  <td colspan="3" align="center">
    <input type="submit" name="Submit" value="Submit">
  </td>
</tr>
</table>
</form>
</td>
</tr>
</table>

insert_ac.php

<?php
include 'config.php';
$tbl_name="users"; // Table name
// Get values from form and formatting them as SQL strings
$name = mysql_real_escape_string($_POST['name']);
$pref = mysql_real_escape_string($_POST['pref']); // Drink preference

// Insert data into mysql 
$sql="INSERT INTO `$tbl_name` (name, pref) VALUES('$name', '$pref')";
$result=mysql_query($sql);

// if successfully insert data into database, displays message "Successful". 
if($result){
echo "Successful";
}else {
echo "ERROR";
}

使用MySQL表填充的PHP下拉列表将选择插入到另一个表中

1 个答案: