如何在超链接中显示PHP变量？

Question

我试图回显一个变量，以便它显示在我的超链接中。 这是我当前的代码：

<?php

if (!defined("WHMCS"))
        die("This file cannot be accessed directly");


$customerserviceid = mysql_query("SELECT id FROM `tblhosting` WHERE `userid` = '{$_SESSION['uid']}'");

function limitOrders($vars) {
        if(mysql_num_rows(mysql_query("SELECT packageid FROM `tblhosting` WHERE `userid` = '{$_SESSION['uid']}'")) > 0) {

                if($packageid = '1' || $packageid = '2' || $packageid = '3' || $packageid = '4' || $packageid = '5' || $packageid = '6' || $packageid = '7' || $packageid = '8' || $packageid = '9' || $packageid = '10') {
                global $errormessage;
                $errormessage = "<li>It looks like you already have an account!  Please <a href='http://mywebsite.com/upgrade.php?type=package&id=$customerserviceid'>click here</a> to upgrade or downgrade your account.</li>";
                }
        }
}
add_hook("ShoppingCartValidateCheckout", 1, "limitOrders");
?>

我尝试将$customerserviceid添加到第14行的URL中，但是它仅显示为空白，因此我猜测我没有正确添加一些内容。 当我在phpMyAdmin中运行查询时，它确实显示了我想要的内容，因此查询本身应该是正确的...

Answer 1

您需要从查询结果中获取结果，然后使用global访问global变量。

<?php
if (!defined("WHMCS"))
        die("This file cannot be accessed directly");

$result = mysql_query("SELECT id FROM `tblhosting` WHERE `userid` = '{$_SESSION['uid']}'");
$row = mysql_fetch_assoc($result);
$customerserviceid = $row['id'];

function limitOrders($vars) {
    global $customerserviceid;
    if(mysql_num_rows(mysql_query("SELECT packageid FROM `tblhosting` WHERE `userid` = '{$_SESSION['uid']}'")) > 0) {

        if($packageid = '1' || $packageid = '2' || $packageid = '3' || $packageid = '4' || $packageid = '5' || $packageid = '6' || $packageid = '7' || $packageid = '8' || $packageid = '9' || $packageid = '10') {
        global $errormessage;
        $errormessage = "<li>It looks like you already have an account!  Please <a href='http://mywebsite.com/upgrade.php?type=package&id=$customerserviceid'>click here</a> to upgrade or downgrade your account.</li>";
        }
    }
}
add_hook("ShoppingCartValidateCheckout", 1, "limitOrders");
?>

Answer 2

我认为您需要获取刚刚执行查询以从数据库中选择数据的数据，但未打印结果，可以使用以下方法：

$query = mysql_query("SELECT id FROM `tblhosting` WHERE `userid` = '{$_SESSION['uid']}'");
$customerserviceid=mysql_fetch_array($query);

Answer 3

mysql_query返回资源。 您需要从资源中获取数据。 您可以这样做。

$result= mysql_query("SELECT id FROM `tblhosting` WHERE `userid` = '{$_SESSION['uid']}'");
$row = mysql_fetch_assoc($result);
$customerserviceid = $row['id'];

这应该工作。