Undefined function get_magic_quotes_gpc() in PHP 8

[liven2]

AS of today Jan. 10th, 2023 After upgrading to PHP 8 I am getting the same error. I changed it back to PHP 7.4 and it removed the error but now I can no longer login into the ADMIN area. Seems to be cascade of issues now. Tried some of the recommendation above but nothing works.

[toivo]

Welcome to the Joomla forum!

The PHP function get_magic_quotes_gpc() was deprecated in PHP 7.4 and removed in PHP 8. The latest versions of Joomla 3 do not use it at all but this function may be used by third party extensions, which makes them incompatible with PHP 8.

Change the level of error reporting in Global Configuration to 'Maximum', set the Debug option and enable the plugin System - Debug. The detailed error messages and PHP call stack will allow you to identify the extension that causes the error so that the extension can be uninstalled.

Ref. PHP: get_magic_quotes_gpc

[larry3460]

Change the level of error reporting in Global Configuration to 'Maximum', set the Debug option and enable the plugin System - Debug

Hi Toivo,

Thanks for this good advise. But how do do you that.
I'm using PHP 7.4.33 and I don't know wher I can change the level of error reporting (is it in configuration.php, line 23

public $error_reporting = 'default';

Should I replace default by maximum ?

Then, where can I set the Debug option? I didn't find it, even in Configuration PHP menu

At last, where can I enable this plugin (System - Debug)? I don't have in the menu Externsions PHP

It would be nice to get more light on this issue. Thanks in advance.
Larry

[toivo]

I'm using PHP 7.4.33 and I don't know wher I can change the level of error reporting (is it in configuration.php, line 23

public $error_reporting = 'default';

Should I replace default by maximum ?

Yes.

Then, where can I set the Debug option?

System - Global Configuration - System tab - Debug Settings - Debug System.

where can I enable this plugin (System - Debug)? I don't have in the menu Externsions PHP

It is in Extensions - Plugins, then search for Debug. If your login belongs to the user group Super Users, you should see Extensions at the top level of the back end menu.

[larry3460]

Thank you Toivo, but I'm trying to run my site locally, under Wamp64.

So, I don't have access to the backend, nor to Joomla.

I only downloaded the files from my site, from the host and imported my database.

Now I'm trying to get my VirtualHost to work and it's my browser page which shows this error message.

[toivo]

Which version of PHP does your remote site have? Go to the Wampserver icon in the System Tray and select the same version of PHP from the list behind PHP - Version.

[larry3460]

Hello,
I'm using PHP 7.4.33 both on my remote site and in Wamp64.
I tried once, to update the remote site to PHP 8.0 and the site was immediatly down.
So I had to go back quicly to 7.4.3

[toivo]

Please write enable and then edit the file configuration.php in the main Joomla folder, as advised earlier.

The FPA results might also help to identify the incompatible extension. Follow the instructions at https://forumpostassistant.github.io/docs/ and copy and paste the BBCode to your reply here.

[larry3460]

Done :

[14-Feb-2023 07:20:37 UTC] PHP 2. fileperms($filename = 'favicon.ico') C:\justeparfaitel\fpa-en.php:1994

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[toivo]

PHP Supports J! 3.9.2: No

That is the problem!

Joomla 3.9.2 was released in early 2019, whereas PHP 7.4 was released 10 months later in November 2019. Therefore some PHP code in Joomla 3.9.2 still uses syntax and functions like get_magic_quotes_gpc() that was deprecated in PHP 7.4. There may be other incompatibilities in Joomla and especially older third party extensions.

Check all the third party extensions for compatibility with later versions of PHP and Joomla before updating either of them. Not just the JED entry of an extension but the developer's website because some of them may not have been updated in JED or integrated the extension with the Joomla! Update System. Some developers may have gone out of business, too.

[larry3460]

Thank you for your help Taivo. You go straight to the point.
I am still new to Joomla.
What can I do now to fix my site?

[toivo]

Stay with PHP 7.4 until you have reviewed all the third party extensions and planned the next few steps in the update path. Do not hesitate to ask any questions at the relevant sub forums here.

It is also possible to get paid help by posting your requirements to the Professional Development Services forum, but read the sticky topics there first.

If you are concerned about the security of your website, the JED has a whole dedicated section called Site Security. There are also services like Phil Taylor's well known https://mysites.guru/, where you can audit and manage several websites through one dashboard service.

[larry3460]

Thank you for these valuable tips.
I now have long weeks of work ahead of me.

But, if I come to you for a message as simple as 'Undefined function get_magic_quotes_gpc', how could I understand the other error messages?

In any case, thank you for your visible willingness to help.

[toivo]

Cheers!

But, if I come to you for a message as simple as 'Undefined function get_magic_quotes_gpc', how could I understand the other error messages?

Feel free to search the Joomla forum for the error messages and you are likely to find the most common cases where those errors can occur. If that does not help, create a new topic in a sub forum suitable for the subject. Not just issues but also general questions about Joomla and extensions are welcome.