Using null as an array offset is deprecated in PHP 8.5 [#3577405]

Problem/Motivation

Encountered deprecation errors while using this module with PHP 8.5:

Deprecated function: Using null as an array offset is deprecated, use an empty string instead in Drupal\entity_embed\EntityEmbedDisplay\FieldFormatterEntityEmbedDisplayBase->build() (line 140 of /var/www/html/web/modules/contrib/entity_embed/src/EntityEmbedDisplay/FieldFormatterEntityEmbedDisplayBase.php)

Steps to reproduce

Upgrade to PHP 8.5
View content containing embedded entities
Find deprecation error(s) in logs

(See https://www.php.net/manual/en/migration85.deprecated.php#migration85.dep...)

Proposed resolution

Fallback to empty string as array index if $fakeEntity->id() is null in FieldFormatterEntityEmbedDisplayBase::build().

Remaining tasks

User interface changes

API changes

Data model changes

Comment	File	Size	Author
#5	3577405-mr66-5.patch	935 bytes	joegraduate

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3577405-php8-5-null-offset changes, plain diff MR !66
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Comments

Comment #1

5 March 2026 at 22:19

joegraduate created an issue. See original summary.

Comment #2

5 March 2026 at 22:21

joegraduate opened merge request !66

Comment #3

joegraduate

English

Arizona, USA

commented 5 March 2026 at 22:30

Assigned:	joegraduate	» Unassigned
Status:	Active	» Needs review

Comment #4

joegraduate

English

Arizona, USA

commented 6 March 2026 at 16:40

Confirmed that example below works for both PHP 8.3 and 8.5:

php > $test = [];
php > $test[NULL]['a'] = 'x';
php > $test[NULL]['b'] = 'y';
php > $test['']['c'] = 'z';
php > print_r($test);
Array
(
    [] => Array
        (
            [a] => x
            [b] => y
            [c] => z
        )

)

Based on these results I believe that the change in MR !66 should preserve the existing functionality (and fix the deprecation errors/warnings on PHP 8.5).