将MySQL转换为MySQLi问题

Question

这是错误行125.实际上，我是MySQLi的新手，所以我无法理解如何将MySQL转换为MySQLi。

这是我的代码：

<?php 

$query = mysql_query("select * from upload ORDER BY id DESC") or die(mysql_error());

while ($row = mysql_fetch_array($query)) {
    $id = $row['id'];
    $name = $row['name'];
    $date=$row['date'];
}

Answer 1

您需要将连接作为参数传递给mysqli_query()：

$connection = mysqli_connect(
    "your_host",
    "your_user",
    "your_password",
    "your_db"
);

$result = mysqli_query(
    $connection, 
    "select * from upload ORDER BY id DESC"
);

if (false === $result) {
    die(mysqli_error($connection));
}

while ($row = mysqli_fetch_array($result)) {
    $id = $row['id'];
    $name = $row['name'];
    $date = $row['date'];
}

供参考，见：

• http://php.net/manual/en/function.mysqli-connect.php
• http://php.net/manual/en/mysqli.query.php
• http://php.net/manual/en/mysqli.error.php
• http://php.net/manual/en/mysqli-result.fetch-assoc.php