<分区>
为什么这段代码什么都不做?他没有回应结果.. 此脚本的目标是回显一列的平均值(保留 2 位小数)。
<?php
if (isset($_GET["age"]));
$age = ($_GET["age"]);
include($_SERVER["DOCUMENT_ROOT"] . "/3/includes/config.php");
$con=mysqli_connect($dbhost,$dbuser,$dbpass,$dbname);
if (mysqli_connect_errno($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$result = mysqli_query($con,"SELECT AVG(price) FROM data WHERE age= '$age'") or die("Error: " . mysqli_error($con));
while($row = mysqli_fetch_array($result));
echo $row['price'];
die();
?>