致命错误:在将 PHP 5.4.22 和 MySQL 5.5 与 Apache 2.4.7 连接时调用未定义的函数 mysqli_connect() in... [英] Fatal error: Call to undefined function mysqli_connect() in... while connecting PHP 5.4.22 and MySQL 5.5 with Apache 2.4.7

问题描述

我正在尝试使用 Apache 2.4.7 作为 Web 服务器连接 PHP 5.4.22 和 MySQL 5.5.所有这三个单独工作正常.但是，当我尝试将 PHP 与 MySQL 连接时，出现错误:

I am trying to connect PHP 5.4.22 and MySQL 5.5 with Apache 2.4.7 as the web server. All three of these individually are working fine. However, when I try to connect PHP with MySQL I get the error:

致命错误:调用未定义的函数 mysqli_connect() in..."

"Fatal error: Call to undefined function mysqli_connect() in..."

db_connect.php 代码

$con = mysqli_connect("localhost","root","root","mylab_dev");

if (mysqli_connect_errno($con))
{
    echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$conn->close();

httpd.conf 配置:

ServerRoot "c:/Apache24"

#Listen 12.34.56.78:80
Listen 80

LoadModule php5_module "C:/php/php5apache2_4.dll" (Verified the existence of the physical file)

AddHandler application/x-httpd-php .php

DirectoryIndex index.php index.html
PHPIniDir c:/php

修改php.ini-development文件为php.ini

Modified php.ini-development file to php.ini

; extension_dir = "./"

; On windows:

extension_dir = "ext"

extension=php_mysql.dll  --> Uncommented

extension=php_mysqli.dll --> Uncommented

相应地设置日期时区

我注意到一件事，但不确定这是否是原因，在 phpinfo() 页面中，我看到了 MySQL 信息，但没有看到任何显示 mysqli() 的内容.我应该吗?

One thing I noticed but not sure if this is the reason, in the phpinfo() page I see the MySQL information, but I don't see anything which says mysqli(). Should I?

推荐答案

首先，通过检查 phpinfo() 确保您正在编辑正确的 php.ini代码>.

First of all, make sure you are editing the correct php.ini by checking from the phpinfo().

我主要为 Windows 用户编写了这些说明:

I wrote these instructions mainly for Windows users:

编辑您的php.ini.

检查变量extension-dir是否设置正确.如果没有，请根据您的操作系统指定正确的路径.

Check whether variable extension-dir is set properly. If not, specify the correct path as per your OS.

extension_dir = "C:Program Filesphpext"

通过删除 ;(分号)取消注释这些行:

Un-comment these lines by removing the ; (semi-colon):

extension=php_mysql.dll
extension=php_mysqli.dll

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