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install.php: PHP7.4 Warning + PHP8 white page #1653

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opened 2026-10-05 00:51:42 +02:00 by adam · 6 comments
adam commented 2026-10-05 00:51:42 +02:00
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I have a fresh web space and want to to install Piwigo. I called install.php

If I click the "Start Installation" button without giving any information

grafik

The following warning appears in the log file:

[29-Mar-2023 21:19:00 Europe/Berlin] PHP Warning:  mysqli::__construct(): (HY000/2002): No such file or directory in /.../piwigo/include/dblayer/functions_mysqli.inc.php on line 52
[29-Mar-2023 21:19:00 Europe/Berlin] PHP Warning:  mysqli::set_charset(): Couldn't fetch mysqli in /.../piwigo/include/dblayer/functions_mysqli.inc.php on line 88

Piwigo 13.6.0
PHP 7.4

If I run PHP8.0/PHP8.1 with Piwigo 13.6.0 the following happens:

After pressing the "Start installation" button a white page loads.

And the following log entries appears in the log:

[29-Mar-2023 21:24:34 Europe/Berlin] PHP Warning:  mysqli::__construct(): (HY000/2002): No such file or directory in /.../piwigo/include/dblayer/functions_mysqli.inc.php on line 52
[29-Mar-2023 21:24:34 Europe/Berlin] PHP Fatal error:  Uncaught Error: mysqli object is already closed in /.../piwigo/include/dblayer/functions_mysqli.inc.php:88
Stack trace:
#0 /.../piwigo/include/dblayer/functions_mysqli.inc.php(88): mysqli->set_charset()
#1 /.../piwigo/install.php(261): pwg_db_check_charset()
#2 {main}
  thrown in /.../piwigo/include/dblayer/functions_mysqli.inc.php on line 88

I cannot use PHP7.4 anymore after March 31st 2023 on my web space.

As a beginner of Piwigo I would expect any short information on the install page, that PHP8 is not supported yet.

I have a fresh web space and want to to install Piwigo. I called install.php If I click the "Start Installation" button without giving any information ![grafik](https://user-images.githubusercontent.com/1645099/228645928-2bb502c5-53f3-42bf-abd3-1df43c508a89.png) The following warning appears in the log file: ``` [29-Mar-2023 21:19:00 Europe/Berlin] PHP Warning: mysqli::__construct(): (HY000/2002): No such file or directory in /.../piwigo/include/dblayer/functions_mysqli.inc.php on line 52 [29-Mar-2023 21:19:00 Europe/Berlin] PHP Warning: mysqli::set_charset(): Couldn't fetch mysqli in /.../piwigo/include/dblayer/functions_mysqli.inc.php on line 88 ``` Piwigo 13.6.0 PHP 7.4 ------------------- If I run PHP8.0/PHP8.1 with Piwigo 13.6.0 the following happens: After pressing the "Start installation" button a white page loads. And the following log entries appears in the log: ``` [29-Mar-2023 21:24:34 Europe/Berlin] PHP Warning: mysqli::__construct(): (HY000/2002): No such file or directory in /.../piwigo/include/dblayer/functions_mysqli.inc.php on line 52 [29-Mar-2023 21:24:34 Europe/Berlin] PHP Fatal error: Uncaught Error: mysqli object is already closed in /.../piwigo/include/dblayer/functions_mysqli.inc.php:88 Stack trace: #0 /.../piwigo/include/dblayer/functions_mysqli.inc.php(88): mysqli->set_charset() #1 /.../piwigo/install.php(261): pwg_db_check_charset() #2 {main} thrown in /.../piwigo/include/dblayer/functions_mysqli.inc.php on line 88 ``` I cannot use PHP7.4 anymore after March 31st 2023 on my web space. As a beginner of Piwigo I would expect any short information on the install page, that PHP8 is not supported yet. <!-- github-sync-id:1646393157 -->
adam commented 2026-10-05 00:51:43 +02:00
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hello the only thing that should not be exceeded is php 8.1 with version 13
8

hello the only thing that should not be exceeded is php 8.1 with version 13 ![8](https://user-images.githubusercontent.com/36087587/228652509-011698fb-7be3-4d78-8bb6-f4a516aa9ada.jpg) <!-- github-comment-id:1489219401 -->
adam commented 2026-10-05 00:51:44 +02:00
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why white page in your site

why white page in your site <!-- github-comment-id:1489229699 -->
adam commented 2026-10-05 00:51:44 +02:00
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If I understood "On the technical side, Piwigo gets compatibility with PHP8.1...." correct it means, that Piwigo 13.6.0 should have no troubles with PHP8.0/PHP8.1

In my first post, I added the PHP errors that appears with PHP7.4 and PHP8.0/8.1.

How else could I answer your question "why white page in your site"? Which information do you miss?

If I understood "On the technical side, Piwigo gets compatibility with PHP8.1...." correct it means, that Piwigo 13.6.0 should have no troubles with PHP8.0/PHP8.1 In my first post, I added the PHP errors that appears with PHP7.4 and PHP8.0/8.1. How else could I answer your question "why white page in your site"? Which information do you miss? <!-- github-comment-id:1489276678 -->
adam commented 2026-10-05 00:51:45 +02:00
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in your errors of the first message claim that there are special characters for example @'éàçè-(")...
try changing your mysql configuration
or there is no write access to the "database.inc.php" file

in your errors of the first message claim that there are special characters for example @'éàçè-(")... try changing your mysql configuration or there is no write access to the "database.inc.php" file <!-- github-comment-id:1491402311 -->
adam commented 2026-10-05 00:51:46 +02:00
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Let me to describe the situation:

I have a fresh new instance.
I opened install.php.
I clicked the "Start Installation" button (I did not type anything into the inputs!).

If I enabled PHP7.4: The error messages (see screenshot: red box) appears AND the given PHP warning was written into the PHP error log.

If I enabled PHP8.0/PHP8.1: A white page appeared, when I clicked the "Start Installation" button AND the second PHP warning+fatal error was written into the PHP error log.

That means: install.php is not ready for PHP8.

Yes, I was able to install successful the application with PHP7.4 (but my web hoster supported PHP7.4 till yesterday. I have to use PHP8 since today).

in your errors of the first message claim that there are special characters for example @'éàçè-(")... try changing your mysql configuration or there is no write access to the "database.inc.php" file

Where is written, that there are special characters?

Let me to describe the situation: I have a fresh new instance. I opened install.php. I clicked the "Start Installation" button (I did not type anything into the inputs!). If I enabled PHP7.4: The error messages (see screenshot: red box) appears AND the given PHP warning was written into the PHP error log. If I enabled PHP8.0/PHP8.1: A white page appeared, when I clicked the "Start Installation" button AND the second PHP warning+fatal error was written into the PHP error log. That means: install.php is not ready for PHP8. Yes, I was able to install successful the application with PHP7.4 (but my web hoster supported PHP7.4 till yesterday. I have to use PHP8 since today). > in your errors of the first message claim that there are special characters for example @'éàçè-(")... try changing your mysql configuration or there is no write access to the "database.inc.php" file Where is written, that there are special characters? <!-- github-comment-id:1492276053 -->
adam commented 2026-10-05 00:51:46 +02:00
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If I understand @math-GH correctly the problem is in (lack of) error reporting during installation, in which case I came here to confirm it. Steps to reproduce:

  1. Start the installation of Piwigo (I am using 13.8.0) on a system with PHP 8.1 (and, in my case, nginx, that might be relevant).
  2. Navigate to piwigo.example.com/install.php (or whatever your domain is ofc).
  3. Misconfigure something (things I inadvertently "tested" before I got it right: wrong address for the mysql server, running php as an incorrect user).
  4. Click "Start installation".

Expected result: an informative error about the installation failing displayed in the browser.

Actual result: Empty white page in the browser. There are some errors in the nginx logs, but they are not particularly helpful (exception when calling a method on the null object that was supposed to be the db connection, trying to write into a false when there are file creation errors).

I'm pretty sure https://github.com/Piwigo/Piwigo/commit/c6eebad0cb94e672be826031348c8aec3856f46b helped at least a bit with the first thing (although the error I got from applying that was a less than helpful "No such file or directory").

If I understand @math-GH correctly the problem is in (lack of) error reporting during installation, in which case I came here to confirm it. Steps to reproduce: 1. Start the installation of Piwigo (I am using 13.8.0) on a system with PHP 8.1 (and, in my case, nginx, that might be relevant). 2. Navigate to `piwigo.example.com/install.php` (or whatever your domain is ofc). 3. Misconfigure something (things I inadvertently "tested" before I got it right: wrong address for the mysql server, running php as an incorrect user). 4. Click "Start installation". Expected result: an informative error about the installation failing displayed in the browser. Actual result: Empty white page in the browser. There are some errors in the `nginx` logs, but they are not particularly helpful (exception when calling a method on the `null` object that was supposed to be the db connection, trying to write into a `false` when there are file creation errors). I'm pretty sure https://github.com/Piwigo/Piwigo/commit/c6eebad0cb94e672be826031348c8aec3856f46b helped at least a bit with the first thing (although the error I got from applying that was a less than helpful "No such file or directory"). <!-- github-comment-id:1663594806 -->
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Reference: adam/Piwigo#1653