Core: Flarum Beta 10, 11 Not Support in PHP 7.4.1

[LianSheng197]

Follow Official Installation Tutorial

https://flarum.org/docs/install.html

Bug Report

Current Behavior
Flarum beta 10, 11 (or all...?) not support in PHP 7.4.1

Steps to Reproduce

1. Using PHP 7.4.1.
2. composer create-project flarum/flarum . --stability=beta
   or
   composer create-project flarum/flarum:v0.1.0-beta.10 . --stability=beta
3. Set all about site setting (httpd-vhosts.conf, httpd.conf).
4. Open the browser, and get the ERROR:

Notice: Trying to access array offset on value of type null in C:\xampp\htdocs\ft\vendor\illuminate\support\ServiceProvider.php on line 84
...

Full error like this:

Expected Behavior
If using PHP 7.3.6, the installer is work.

Environment

• Flarum version: v0.1.0-beta.10, v0.1.0-beta.11
• Website URL: localhost
• Webserver: Apache
• Hosting environment: localhost
• PHP version: 7.3.6, 7.4.1
• Browser: Google Chrome 79.0.3945.130

Output of "php flarum info", run this in terminal in your Flarum directory.

C:\xampp\htdocs\ft>php --version
PHP 7.4.1 (cli) (built: Dec 17 2019 19:24:02) ( ZTS Visual C++ 2017 x64 )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies

C:\xampp\htdocs\ft>php flarum info
PHP Notice:  Trying to access array offset on value of type null in C:\xampp\htdocs\ft\vendor\illuminate\support\ServiceProvider.php on line 84

Notice: Trying to access array offset on value of type null in C:\xampp\htdocs\ft\vendor\illuminate\support\ServiceProvider.php on line 84


  Command "info" is not defined.  

[franzliedke]

Nice catch, thanks for the report!!!

Can you try out this change and see whether that works? (You will find the appropriate files in the vendor/flarum/core directory.

[LianSheng197]

It works, but...
Only for the installer page... xDDD

Here is error from Flarum installing:

Hell of "Trying to access array offset on value of type null"

It's seems like PHP 7.4 change and deprecation.

---

Test Environment

• Flarum version: beta.10
• PHP version: 7.4.1

---

---

Update

I tried refresh the page, and it is work so far.
I'm not sure if there are any hidden issues, but at least I have tried many of the core functions of the forums, and they are all normal.

[franzliedke]

Thanks for your help!!!
We will have to switch to another LESS library, it seems, but right now that's harder than I thought.

In the meantime - as a hack - can you add this line after the opening PHP tag of public/index.php?

~php
error_reporting(E_ALL ^ E_NOTICE);
~

[LianSheng197]

Thank you!
I tried to reinstall beta.10 with PHP 7.4.1 and just change this and this, then the installation worked perfectly, without any extra errors throwing.

Looking forward to future updates :D

[franzliedke]

I've sent a pull request to the Wikimedia less.php fork to add back support for PHP 7.1. Let's hope they accept this. :smile:

[franzliedke]

Okay, I hope this PR fixes all problems. :smiley: