php - 如何修复 : Warning: mysqli_get_server_info() expects parameter 1 to be mysqli?

Question

我的 PHP 非常糟糕，我正在尝试在我的主机上安装 arfoo.com。我在使用 mysql 和 mysqli 时遇到了一些问题，现在已修复。

但是现在我得到这个错误:

Warning: mysqli_get_server_info() expects parameter 1 to be mysqli, string given in /home/***/install/step4.php on line 47

对于下面的代码:

<?php
/**
 * Arfooo
 * 
 * @package    Arfooo
 * @copyright  Copyright (c) Arfooo Annuaire (fr) and Arfooo Directory (en)
 *             by Guillaume Hocine (c) 2007 - 2010
 *             http://www.arfooo.com/ (fr) and http://www.arfooo.net/ (en)
 * @author     Guillaume Hocine & Adrian Galewski
 * @license    http://creativecommons.org/licenses/by/2.0/fr/ Creative Commons
 */
session_start();
error_reporting(E_ALL);
require_once('languages/' . $_SESSION['selectedLanguage'] . '.php'); 

$chemin_includes_header = 'includes/';
include_once($chemin_includes_header.'header.php'); 

require_once("dbfunctions.php"); 
require_once("createdb.php");

function createDbConfig($dbHost, $dbUser, $dbPass, $dbName, $dbPrefix)
{
    $dbConfig['DB_HOST'] = $dbHost;
    $dbConfig['DB_USER'] = $dbUser;
    $dbConfig['DB_PASS'] = $dbPass;
    $dbConfig['DB_NAME'] = $dbName;
    $dbConfig['DB_PREFIX'] = $dbPrefix;
    $dbConfig['DB_INSTALLED'] = true;

    $data = "<?php\n \$dbConfig = " . var_export($dbConfig, true). ";\n ?>";
    file_put_contents("../config/db.php", $data);
}

$_SESSION['mysqlServer'] = $_POST['mysqlServer'];
$_SESSION['mysqlUser'] = $_POST['mysqlUser'];
$_SESSION['mysqlPassword'] = $_POST['mysqlPassword'];
$_SESSION['mysqlDatabaseName'] = $_POST['mysqlDatabaseName'];
$_SESSION['mysqlTablesPrefix'] = $_POST['mysqlTablesPrefix'];

dbConnect($_SESSION['mysqlServer'],
          $_SESSION['mysqlUser'],
          $_SESSION['mysqlPassword'],
          $_SESSION['mysqlDatabaseName']
          );

$mysqlVersion = mysqli_get_server_info();    

$mysqlVersionCorrect = version_compare($mysqlVersion, "4.1", ">=");

if($mysqlVersionCorrect)
{

    createDbConfig($_POST['mysqlServer'],
                   $_POST['mysqlUser'],
                   $_POST['mysqlPassword'],
                   $_POST['mysqlDatabaseName'],
                   $_POST['mysqlTablesPrefix']);



    $tablesList = createDbTables($_POST['mysqlTablesPrefix'],
                                 $_SESSION['siteRootUrl'],
                                 $_SESSION['selectedLanguage'],
                                 $_SESSION['urlRewriting']
                                 );
}
else
{
    $tablesList = array();
}

?>

编辑:

function dbConnect($server, $user, $pass, $dbName)
{

    /* install database with prefixed tables */

    $conn = mysqli_connect($server, $user, $pass, $dbName);
    //mysql_connect($server, $user, $pass) or die('could not connect to mysql');;

    mysqli_query($conn, 'CREATE TEMPORARY TABLE table');
    //mysqli_query($dbName, 'CREATE TEMPORARY TABLE `table`');
    //mysql_query('create database IF NOT EXISTS ' . $dbName);

    mysqli_select_db($conn, $dbName) or die('could not select database');
}

非常感谢任何善意的帮助!

Answer 1

如果您想使用过程式风格，您应该将 mysqli_connect() 返回的对象作为参数传递给 mysqli_get_server_info()。

$mysqlConnect = mysqli_connect("localhost", "my_user", "my_password");
$mysqlVersion = mysqli_get_server_info($mysqlConnect);    

或者使用面向对象的风格:

$mysqlConnect = new mysqli("localhost", "my_user", "my_password");
$mysqlVersion = $mysqlConnect->server_info;

查看更多信息 http://php.net/mysqli_get_server_info

编辑:

你的 dbConnect() 函数应该返回 mysqli 对象，尝试在最后添加 return $conn; ，就像这样:

function dbConnect($server, $user, $pass, $dbName)
{

    /* install database with prefixed tables */

    $conn = mysqli_connect($server, $user, $pass, $dbName);
    //mysql_connect($server, $user, $pass) or die('could not connect to mysql');;

    mysqli_query($conn, 'CREATE TEMPORARY TABLE table');
    //mysqli_query($dbName, 'CREATE TEMPORARY TABLE `table`');
    //mysql_query('create database IF NOT EXISTS ' . $dbName);

    mysqli_select_db($conn, $dbName) or die('could not select database');

    return $conn;
}