TypeError array_flip(): Argument #1 ($array) must be of type array, null given

[kbergha]

Description

Hi. I'm getting a type error when trying to edit a single that has a CKE-field.
It's probably related to the setting for "who should see the source button", which I have turned off for everyone.

The field has a custom CKE config, and a custom HTML Purifier config (not sure if these are relevant).

After removing the field, the editing works as expected when adding other field types, like plain text.

Steps to reproduce

CKE config:

Field setup:

Entry type setup:

HTML-purifier config (Default.json):

{
  "AutoFormat.Linkify": true,
  "AutoFormat.RemoveEmpty": true,
  "AutoFormat.RemoveEmpty.RemoveNbsp": true,
  "HTML.Allowed": "a[href],p,ul,ol,li,h2,h3,h4"
}

Then, trying to edit an existing single:

Stacktrace:

TypeError: array_flip(): Argument #1 ($array) must be of type array, null given in /app/vendor/craftcms/ckeditor/src/Field.php:1208
Stack trace:
#0 /app/vendor/craftcms/ckeditor/src/Field.php(1208): array_flip(NULL)
#1 /app/vendor/craftcms/ckeditor/src/Field.php(891): craft\ckeditor\Field->isSourceEditingAllowed(Object(craft\elements\User))
#2 /app/vendor/craftcms/cms/src/base/Field.php(708): craft\ckeditor\Field->inputHtml(NULL, Object(craft\elements\Entry), false)
#3 /app/vendor/craftcms/cms/src/fieldlayoutelements/CustomField.php(406): craft\base\Field->getInputHtml(NULL, Object(craft\elements\Entry))
#4 /app/vendor/craftcms/cms/src/fieldlayoutelements/BaseField.php(365): craft\fieldlayoutelements\CustomField->inputHtml(Object(craft\elements\Entry), false)
#5 /app/vendor/craftcms/cms/src/fieldlayoutelements/CustomField.php(357): craft\fieldlayoutelements\BaseField->formHtml(Object(craft\elements\Entry), false)
#6 /app/vendor/craftcms/cms/src/web/View.php(1885): craft\fieldlayoutelements\CustomField->craft\fieldlayoutelements\{closure}()
#7 /app/vendor/craftcms/cms/src/fieldlayoutelements/CustomField.php(356): craft\web\View->namespaceInputs(Object(Closure), 'fields')
#8 /app/vendor/craftcms/cms/src/models/FieldLayout.php(1013): craft\fieldlayoutelements\CustomField->formHtml(Object(craft\elements\Entry), false)
#9 /app/vendor/craftcms/cms/src/web/View.php(1879): craft\models\FieldLayout->craft\models\{closure}()
#10 /app/vendor/craftcms/cms/src/models/FieldLayout.php(1012): craft\web\View->namespaceInputs(Object(Closure), NULL)
#11 /app/vendor/craftcms/cms/src/controllers/ElementsController.php(1013): craft\models\FieldLayout->createForm(Object(craft\elements\Entry), false, Array)
#12 /app/vendor/craftcms/cms/src/controllers/ElementsController.php(406): craft\controllers\ElementsController->_prepareEditor(Object(craft\elements\Entry), false, true, Object(craft\web\Response), 'main-form', Object(Closure), Object(Closure), Object(Closure))
#13 [internal function]: craft\controllers\ElementsController->craft\controllers\{closure}(Object(craft\web\Response), 'main-form')
#14 /app/vendor/craftcms/cms/src/web/CpScreenResponseFormatter.php(125): call_user_func(Object(Closure), Object(craft\web\Response), 'main-form')
#15 /app/vendor/craftcms/cms/src/web/CpScreenResponseFormatter.php(50): craft\web\CpScreenResponseFormatter->_formatTemplate(Object(craft\web\Response), Object(craft\web\CpScreenResponseBehavior))
#16 /app/vendor/yiisoft/yii2/web/Response.php(1109): craft\web\CpScreenResponseFormatter->format(Object(craft\web\Response))
#17 /app/vendor/craftcms/cms/src/web/Response.php(341): yii\web\Response->prepare()
#18 /app/vendor/yiisoft/yii2/web/Response.php(340): craft\web\Response->prepare()
#19 /app/vendor/yiisoft/yii2/base/Application.php(390): yii\web\Response->send()
#20 /app/web/index.php(12): yii\base\Application->run()
#21 {main}

Additional info

• Craft version: Craft Pro 5.6.1
• PHP version: 8.3.13
• Database driver & version:
• Plugins & versions: CKEditor | 4.5.0

[Diewy]

Got the same error. When selecting at least one option in the 'Who should see the “Source” button?', the field works again.

[i-just]

Hi, thanks for reporting! I raised a PR for this.

[corneliusio]

Have also run into this on a recent project upgrade. Want to call out that it occurs both in Craft 4 (vendor/craftcms/ckeditor/src/Field.php:588) and Craft 5 (vendor/craftcms/ckeditor/src/Field.php:1208).

@i-just Thanks for submitting a PR!

[corneliusio]

Have opened a PR for the 4.x branch as well.

[brandonkelly]

CKEditor 3.11.1 (Craft 4) and 4.6.0 (Craft 5) are out with that fix. Thanks again!