使用 PHP 从 MySQL 数据库中获取记录以填充下拉列表 [英] Fetching records from MySQL database with PHP to populate a drop down list

问题描述

我的代码有问题.我正在尝试从我的数据库中填充一个下拉列表，但该列表显示的是空白空间而不是数据库条目.如果有人能帮助我，我将不胜感激.

im having trouble with my code. I'm trying to populate a drop down list from my database but the list is showing empty space instead of database entries. I would be very grateful if anyone could help me.

<?php
include("db_config.php");
$sql="SELECT * FROM brojevi";
$result=mysqli_query($connection,$sql);
echo "<select name=\"id\" size=\"1\">";
echo "<option value=\"choose\">-choose-</option>";
while($row=mysqli_fetch_array($result)){
unset($id,$broj);
$id=$row['id'];
$broj=$row['brojevi'];
echo "<option value=\"$id\">$broj</option>";
}
echo "</select>";
?>

这是表格(这是一个简单的原因，我只是为了练习而做的)

Here is the table( its a simple one cause im just making this for practice )

 CREATE TABLE `brojevi` (
 `id` int(11) NOT NULL auto_increment,
 `broj` int(11) NOT NULL,
 PRIMARY KEY  (`id`)
 );

INSERT INTO `brojevi` (`id`, `broj`) VALUES
(1, 1),
(2, 2);

推荐答案

你弄乱了单引号和双引号.试试这个:

You are messing up your single and double quotes. Try this:

<?php
include("db_config.php");
$sql="SELECT * FROM brojevi";
$result=mysqli_query($connection,$sql);
echo '<select name="dropdown" size="1">';
echo '<option value="choose">-choose-</option>';
while($row=mysqli_fetch_array($result)){
    $id = $row['id'];
    $broj = $row['brojevi'];
    echo '<option value="' . $id . '">' . $broj . '</option>';
}
echo '</select>';
?>

在 echo 中使用 html 标签时，尝试对 echo 使用单引号，对值、id、classes 等 html 内容使用双引号.

When using html tags inside your echo, try to use single quotes for the echo and double quotes for html stuff like values,id's,classes etc.

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