在(php-fpm)docker容器中找不到mysqli [英] mysqli not found in (php-fpm) docker container

问题描述

我正在运行

解决方案

您的问题不是您缺少mysqli扩展名.

如果您正在执行以下操作:

 命名空间侦听器；Foo类{公共功能bar(){$ conn =新的mysqli(...);}} 

然后，PHP将把 new mysqli()解释为 new \ Listener \ mysqli()，因为您当前位于 \ Listener 命名空间中.要解决此问题，您可以将 mysqli()明确锚定到根名称空间:

  $ conn = new \ mysqli(...); 

I'm running php:7-fpm in a docker container that is used by my nginx web server. Everything is working nicely except for when I'm trying to instantiate a mysqli connection in my PHP code. I receive the following error:

"NOTICE: PHP message: PHP Fatal error:  Uncaught Error: Class 'Listener\mysqli' not found in index.php:104

Here's my Dockerfile for building the image, where I explicitly install the mysqli extension:

FROM php:7-fpm

RUN docker-php-ext-install mysqli

It appears to be installed given the phpinfo() output below. Do I need to configure or enable it somehow?

解决方案

Your problem isn't that you're missing the mysqli extension.

If you're doing something like this:

namespace Listener;

class Foo
{
    public function bar() {
        $conn = new mysqli(...);
    }
}

Then PHP will interpret new mysqli() as new \Listener\mysqli() because you're currently in the \Listener namespace. To fix this, you can just explicitly anchor mysqli() to the root namespace:

$conn = new \mysqli(...);

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