PHP 8.1: Deprecated function: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in _node_special_character_form_validate() [#3272179]

Problem/Motivation

If using PHP 8.1 (which is supported in Drupal 9.3.x), you get this error message (the error is reported for custom_body_class.module line 122).

N.B. PHP 8.1 will be a requirement for Drupal 10.

Steps to reproduce

Configure your server to use PHP 8.1. Edit a node and save.

Proposed resolution

The error has been reported and fixed on other modules (see https://www.drupal.org/project/views_aggregator/issues/3252703 for instance)

Comment	File	Size	Author
#3	3272179-3.patch	886 bytes	tmaiochi

Issue fork custom_body_class-3272179

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3272179-php-8.1-deprecated changes, plain diff MR !3
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Comments

Comment #1

29 March 2022 at 09:53

quimic created an issue. See original summary.

Comment #2

tmaiochi commented 29 March 2022 at 11:03

Assigned:

Unassigned

» tmaiochi

I'll work on this!

Comment #3

tmaiochi commented 29 March 2022 at 11:38

Assigned:	tmaiochi	» Unassigned
Status:	Active	» Needs review

Status	File	Size
new	3272179-3.patch	886 bytes

I fixed the error message in this patch, kindly review it!

Comment #4

quimic

French

Paris

commented 29 March 2022 at 13:54

@tmaiochi Thank you for you quick fix.

After testing I can confirm that the error is gone.

Comment #5

Guilherme Rabelo commented 29 March 2022 at 18:03

Assigned:

Unassigned

» Guilherme Rabelo

Hi, i will test if the error is gone.

Comment #6

Guilherme Rabelo commented 29 March 2022 at 18:32

Assigned:	Guilherme Rabelo	» Unassigned
Status:	Needs review	» Reviewed & tested by the community

Hi, i applied the #3 patch, enabled the module and add a custom css class for an article. Then i saved the edit to the article and checked the log to see if the error persisted. This patch solved the error of this issue, everything seems to be correct for me.
Moving to RTBC!

Comment #7

slawomir commented 8 June 2022 at 03:03

Heyyo, the patch cleared the error - thank you! When I add a class on a post now, it all seems to save ok. That said, the class does not get added... and when I return to edit the post, the field is blank again...

Comment #8

1 September 2022 at 21:40

gueguerreiro made their first commit to this issue’s fork.

Comment #9

1 September 2022 at 21:43

gueguerreiro opened merge request !3

Comment #10

1 September 2022 at 21:56

gueguerreiro committed 33cf346 on 8.x-1.x

Issue #3272179: PHP 8.1: Deprecated function: preg_match(): Passing null...

Comment #11

gueguerreiro

Portuguese, Portugal

Lisboa

commented 1 September 2022 at 22:14

Status:

Reviewed & tested by the community

» Fixed

Terribly sorry everyone, it seems I did not have e-mail notifications enabled for this project 😅 so I've been missing quite a lot of issues.

I've committed a fix and pushed it to a new release.

I'll be looking at the remaining outstanding issues over the weekend, it seems some other things are not entirely OK with the module.

Comment #12

15 September 2022 at 22:14

Status:

Fixed

» Closed (fixed)

Automatically closed - issue fixed for 2 weeks with no activity.

PHP 8.1: Deprecated function: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in _node_special_character_form_validate()