MySQLi：无法将结果绑定到变量

Question

以下脚本通过其唯一标记在数据库中查询客户。然后它再次查询数据库以检查“account_modules”表中是否有一行。如果没有，则创建一行并将“援助”列设置为客户的唯一ID。

我将“clientid”变量设置为0.在代码下方回显值。感谢您的帮助！

<?php 

//Required file for database config
require_once('../includes/config.php');

//Set the GLOBAL GET to variable
$token = htmlspecialchars($_GET['token']);

//Set the search query with unbinded values
$search = $connection->prepare("SELECT id, client, email, plan, uniqueval FROM account WHERE uniqueval = ?");

//Bind variable to SELECT query
$search->bind_param("s", $token);

//Execute query through IF statement
if ($search->execute()) {

    //Bind the results to their variables through the if statement
    if ($search->bind_result($clientid, $business, $email, $plan, $newtoken)) {

        echo $token . "<br />" . $clientid . "<br />" . $business . "<br />" . $email . "<br />" . $plan . "<br />" . $newtoken;

        //Close this database query
        if ($search->close()) {

            //Set the query string to search unbinded perameter
            $valconfig = $connection->prepare("SELECT aid FROM account_modules WHERE aid = ?");

            //Set the perameter 'WHERE aid = ?' to the query
            $valconfig->bind_param("s", $clientid);

            //Execute the query through MySQLi
            $valconfig->execute();

            //Stores the number for counting
            $valconfig->store_result();

            //Count the number of bulletins today
            $unique_count = $valconfig->num_rows;

            //Close the session with the results to username check
            $valconfig->close();

            if ($unique_count == 0) {

                //Set the query string to search unbinded perameter
                $insert = $connection->prepare("INSERT INTO account_modules (aid) VALUES (?)");

                //Set the perameter 'VALUES = (?)' to the query
                $insert->bind_param("s", $clientid);

                if ($insert->execute()) {

                    $created = "config";

                }

            }

        }

    }

}

?>

Echod值

74b450bf7b42a3499dc4a8f9b5a69cca

0

[blank]

[blank]

[blank]

[blank]