如何从DATABSE获得价值并将其设置在PHP

-2

image for the result我试图从DATABSE获得价值并将其设置为下拉框下拉列表但它没有得到任何价值这里是我的代码如何从DATABSE获得价值并将其设置在PHP

<?php 
$sql=mysqli_query("SELECT RoomTypeId from roomtypemaster"); 
if(mysqli_num_rows($sql)){ 
echo '<select name="select">'; 
while($rs=mysqli_fetch_array($sql)){ 
     echo '<option value="'.$rs['RoomTypeId'].'">'.$rs['RoomTypeId'].'</option>'; 

    } 
} 
echo '</select>'; 
    ?>

来源

2017-06-14 Yogesh

检查的print_r（mysqli_fetch_array（$ SQL））有数据或者没有 –

首先哪里是你的数据库连接变量 – JYoThI

mysqli_query至少需要两个参数 –

mysqli_query函数占用至少两个参数。您在调用mysqli_query（）函数时没有提供连接变量。

mysqli_query (mysqli $link , string $query)

作为每PHP参考：

链路：只有程序式：）由mysqli_connect（）或mysqli_init（返回的链路标识符

查询：查询字符串。

http://php.net/manual/en/mysqli.query.php

来源

2017-06-14 10:42:11 Sehdev

<?php 
// you should connect the database 
$servername = "localhost"; 
$username = "username"; 
$password = "password"; 
$dbname = "myDB"; 

// Create connection 
$conn = new mysqli($servername, $username, $password, $dbname); 
// Check connection 
if ($conn->connect_error) { 
    die("Connection failed: " . $conn->connect_error); 
} 
$sql=mysqli_query("SELECT RoomTypeId from roomtypemaster"); 
$result = $conn->query($sql); 
//after this you will check the number of rows from your database table 
$count = mysqli_num_rows(); 
if($count>0){ 
    echo '<select>'; 
    while($data = $result->mysql_fetch_aasoc()){ 
    echo '<option value="'.$data['RoomTypeId'].'">'.$data['RoomTypeId'].'</option>'; 
    } 
    echo '</select>'; 
} 
?>

来源

2017-06-14 10:56:34

如何从DATABSE获得价值并将其设置在PHP

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