So erhalten Sie Datenbankinhalte in PHP

<?php
//从数据库根据 id 获取颜色
function getColor($db, $id)
{
    if ($result = $db->query("SELECT * FROM color where id=&#39;" . $id . "&#39;"))
    {
        $row = $result->fetch_assoc();
        return $row[&#39;color&#39;];
    }
    return &#39;#000000&#39;;
}
 
$mysqli = new mysqli("localhost", "test", "test", "room");
 
if ($mysqli->connect_error) {
    printf("数据库连接错误: %s\n", mysqli_connect_error());
    exit();
}
 
?>
<table border="1" cellspacing="0">
<tr>
<td bgcolor="<?php echo getColor($mysqli,&#39;1&#39;)?>">1</td>
</tr>
<tr>
<td bgcolor="<?php echo getColor($mysqli,&#39;2&#39;)?>">2</td>
</tr>
<tr>
<td bgcolor="<?php echo getColor($mysqli,&#39;3&#39;)?>">3</td>
</tr>
</table>
 
<?php
 
$mysqli->close();
 
?>