致命错误:未找到类“MySQLi”。-Fatalerror:Class'MySQLi'notfound

8  

In addition to uncommenting the php_mysqli.dll extension in php.ini, also uncomment the extension_dir directive in php.ini and specify your location:

除了取消对php_mysqli的注释。dll在php扩展。ini，也取消了php的extension_dir指令。ini并指定您的位置:

extension_dir = "C:\software\php\dist\ext"

This made it work for me.

这使它对我起作用。

5  

My OS is Ubuntu. I solved this problem by using:

我的操作系统是Ubuntu。我用以下方法解决了这个问题:

sudo apt-get install php5-mysql

2  

Seems like problem with your installation.

看来你的安装有问题。

• Have you installed MySQLi?
• 你安装MySQLi吗?
• Have you activated it in php.ini?
• 你把它激活了吗?

http://www.php.net/manual/en/mysqli.installation.php

http://www.php.net/manual/en/mysqli.installation.php

1  

You can use a handwritten MYSQLi class, so you don't need to install mysqli. It's the only solution if you don't own the server.

您可以使用一个手写的MYSQLi类，因此您不需要安装MYSQLi。如果你不拥有服务器，这是唯一的解决方案。

1  

I thought I might help anybody with the same problem using Namesco servers. I have been trying to fix this problem after moving a database from my local server on home pc to namesco. They would not assist they said it was a coding issue.

我想我可以用Namesco服务器来帮助任何人解决同样的问题。我一直在试图解决这个问题，从我的本地服务器上的本地服务器到namesco。他们不会帮助他们说这是一个编码问题。

• However, it was simple to fix from their CPANEl LINUX hosting interface.
• 但是，从他们的CPANEl LINUX主机接口中进行修复很简单。
• Click on php.
• 单击php。
• then click on php modules and from their list of preinstalled modules just click the box for mysqli.
• 然后单击php模块，并从它们的预安装模块列表中单击mysqli的复选框。
• Then click save. (No need to change code if it worked(s) on another server.)
• 然后单击save。(如果它在另一台服务器上工作，不需要更改代码。)

Unfortunately, their support articles were a waste of time. After reading this I went to admin interface with a new determination.

不幸的是，他们的支持文章是在浪费时间。读完这篇文章后，我用新的决心去管理界面。

Thank you, everybody.

谢谢你,每一个人。

0  

Some distributions (such as Gentoo) support multiple installations of PHP, and you have to make sure you're using one with mysqli installed and enabled.

一些发行版(比如Gentoo)支持PHP的多个安装，并且您必须确保使用的是mysqli安装和启用的。

On Gentoo, I had installed a new PHP (with the mysqli USE flag enabled), but I needed to activate the new version of PHP (since the old one must have been missing mysqli):

在Gentoo上，我安装了一个新的PHP(启用了mysqli使用标志)，但我需要激活新版本的PHP(因为旧版本肯定是丢失了mysqli):

# eselect php list apache2
  [1]   php5.3 *
  [2]   php5.5
# eselect php set apache2 2
You have to run `/etc/init.d/apache2 restart' for the changes to take effect
# /etc/init.d/apache2 restart

0  

host, $this->user, $this->pass, $this->db);

            if (mysqli_connect_error()) {
                die('Connect Error (' . mysqli_connect_errno() . ') ' .
                    mysqli_connect_error());
            }
        }
    }
?>

0  

This solved the initial 'not found' error for me. Note the backslash, works like a dream now. Only necessary when using a namespace but who doesn't nowadays?

这解决了初始的“未发现”错误。注意反斜杠，现在就像一个梦。只有在使用名称空间时才有必要，但现在谁不使用呢?

$mysqli = new \MySQLi($db_server, $db_user, $db_pass, $db_name) or die(mysqli_error());

$mysqli = new \ mysqli ($db_server， $db_user， $db_pass， $db_name)或die(mysqli_error());

0  

I checked all above and it didn't work for me,

我检查了上面所有的东西，它对我没用，

There are some steps I found.

我发现了一些步骤。

I used PHP Version 5.5.9-1ubuntu4.17 on Ubuntu 14.04

我在Ubuntu 14.04上使用了PHP 5.5.9-1ubuntu4.17。

First check the folder

首先检查文件夹

#ls /etc/php5/mods-available/
json.ini  mcrypt.ini  mysqli.ini  mysql.ini  mysqlnd.ini  opcache.ini  pdo.ini  pdo_mysql.ini  readline.ini  xcache.ini

If it did not contain mysqli.ini, read other answer for installing it,

如果它不包含mysqli。ini，请阅读其他安装它的答案，

Open php.ini find extension_dir

打开php。ini找到extension_dir

In my case , I must set extension_dir = /usr/lib/php5/20121212

在我的例子中，我必须设置extension_dir = /usr/lib/php5/20121212。

And restart apache2 : /ect/init.d/apache2 restart

并重新启动apache2: /ect/init。d /输入重启

0  

The PHP zip includes most of the commonly used extensions (*.dll on windows such as php_mysqli.dll) under the \ext directory, however they are not enabled by default. You might be getting this Fatal Error when trying to use MySQLi:

PHP zip包含了大多数常用的扩展(*。在\ext目录下的windows上的dll(如php_mysqli.dll)，但是默认情况下是不启用的。在尝试使用MySQLi时，您可能会遇到这个致命错误:

( ! ) Fatal error: Uncaught Error: Class 'mysqli' not found in C:\myProject\ class.Database.php on line 24

To enable extensions, open php.ini (you might need to first copy php.ini-development as php.ini), and un-comment (or add) these two lines:

要启用扩展，请打开php。ini(您可能需要首先复制php)。作为php.ini)，和un-comment(或添加)这两行:

extension_dir = "ext"

And any particular extensions you are getting Fatal Errors for, i.e. for mysqli:

任何特定的扩展都有致命错误，比如mysqli:

extension=mysqli