如何从SQL的最后一行分配给PHP变量单个值

Question

我正在尝试从SQL的最后一行获取值，然后将其分配给php变量

<?php
    $get_last_record = "SELECT code FROM table_name ORDER BY id DESC LIMIT 1
?>

所以我已经有了最后一个只有“代码”值的行，现在我应该如何将它分配给变量？

Answer 1

<?php $get_last_record = "SELECT code FROM table_name ORDER BY id DESC LIMIT 1"; $result_query = mysqli_query($reference_to_your_mysqli_connect, $get_last_record); $data_from_query = mysqli_fetch_assoc($result_query); $code = $data_from_query['code']; echo $code; ?>

Answer 2

Hope following is what you are trying, I have a db named "prod" and table named "products" with a column named "code"

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "prod";
try
{
$conn = new mysqli($servername, $username, $password, $dbname);
}
catch(Exception $e)
{
echo "Connection failed: " . $e->getMessage();
}
$sql = "SELECT code from products order by id desc LIMIT 1;";
$result = $conn->query($sql);
$row = $result->fetch_assoc();
$codevar = $row['code'];
echo $codevar;

？>