Bastien59960 Admin Helper — phpBB 3.3+ Extension

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Admin Helper groups together several practical phpBB administration and moderation tools in a single extension:

• safer ACP mass email with RFC 8058 unsubscribe support
• unsubscribe audit logs and restore tools
• cron_lock reliability hardening
• full post body and non-inline attachments on author search
• internal moderation notes on posts
• AI-image declaration and automatic source detection on attachments

Features at a glance

Feature	Where
Search members by email	ACP › Users and Groups
Mass email hardening + one-click unsubscribe	ACP › General › Email
Unsubscribe logs and counters	ACP › Extensions › Admin Helper
cron_lock watchdog and safe release	background
Full post body on author search	search.php?author_id=N&sr=posts
Moderation notes on posts	viewtopic — moderators only
AI-generated image declaration and scan	posting + ACP

AI attachment feature

ACP > Extensions > Admin Helper > AI-generated images

Admin Helper can mark image attachments as AI-generated and show a public warning under the image on the forum.

• A manual checkbox lets posters declare that an image is AI-generated.
• Strong technical signatures are auto-detected at upload time and during batch scans.
• When detection is reliable, the checkbox is auto-checked and locked.
• The posting/editing page does not run bulk scans; it only reuses stored state and lightweight attachment metadata.
• The detected AI source is shown publicly only when it is identified automatically from the file itself.
• Current strong signals include C2PA / Content Credentials, known AI-tool metadata, and preserved prompt/parameter payloads.
• Existing images can be scanned in bulk from ACP or CLI.

Current detection scope

• Gemini can be identified when Google/Gemini C2PA markers are present.
• ChatGPT can be identified when OpenAI / ChatGPT C2PA or metadata markers are present.
• The generic "AI-generated image" flag may still be declared manually by the poster.
• No AI source is assigned manually by the extension. If the file does not prove the source, the forum only shows the generic AI warning.

CLI

php bin/phpbbcli.php adminhelper:attachment-ai-scan --batch=1000 --max-seconds=0

Stored data

Table	Purpose
adminhelper_unsubscribe_log	Unsubscribe audit log
adminhelper_mod_notes	Internal moderation notes on posts
adminhelper_attachment_ai	AI-image state for attachments, scan status, detected source

Requirements

• PHP >= 7.1.3
• phpBB >= 3.3.0
• MariaDB / MySQL

Installation

1. Copy bastien59960/adminhelper into ext/.
2. Enable the extension:

php bin/phpbbcli.php extension:enable bastien59960/adminhelper
php bin/phpbbcli.php cache:purge

Update

After updating files:

php bin/phpbbcli.php db:migrate -n
php bin/phpbbcli.php cache:purge

Uninstall

php bin/phpbbcli.php extension:disable bastien59960/adminhelper
php bin/phpbbcli.php extension:purge bastien59960/adminhelper

Language coverage

• Full current coverage: fr, en
• Legacy files also exist for de, es, it, but the newest AI-attachment strings are not yet fully translated there.

Author

Bastien (bastien59960)