KarmaPlus for SMF 2.1 — Reputation/Karma System, Upvotes & Downvotes, Anti-Spam URL Blocker

Turn your Simple Machines Forum (SMF 2.1.x) into a modern, community-driven platform with KarmaPlus — a lightweight, hook-based reputation/karma mod that adds upvote/downvote buttons, visible Karma+ scores in profiles and mini-profiles, and an anti-spam URL posting limiter for new or low-reputation members.

Why forum owners love KarmaPlus

• Boost quality content: Members earn (or lose) karma via +1/-1 voting on topics and profiles.

• Stop link spam automatically: Block URLs for newbies until they reach your minimum posts and/or karma thresholds.

• Granular control: Daily voting limits, group-based voting permissions, and a one-vote-per-member cooldown are built in.

• No theme edits: Uses SMF integration hooks only; clean install & uninstall.

• Admin-friendly settings: Manage everything under Admin → Configuration → Modification Settings → KarmaPlus.

• Safe by design: Voting links include SMF session tokens (CSRF protection) and redirect safely back to the page a user voted from.

Key Features 

• SMF reputation system / SMF karma system with user upvote & downvote controls

• Block links for new members in SMF until minimum posts and/or minimum karma are met

• Karma score badge in mini-profile and profile summary

• Daily vote limit and 24-hour cooldown per target member

• Permissions integration: “Give Karma+ votes”, “See Karma+ scores”, and bypass link limits permission

• Group whitelist to restrict who can vote (CSV of group IDs)

• SMF 2.1.0 – 2.1.99 compatibility

• Zero template edits, hook-based install/uninstall scripts

• InnoDB tables for performance and data integrity

Admin Settings you control

• Minimum Karma required to post URLs

• Minimum Posts required to post URLs

• Votes per day per member

• Group IDs allowed to vote (CSV)

Compatibility

• SMF 2.1.x (2.1.0 – 2.1.99)

• Works with default theme and custom themes that show mini-profile fields (no core edits)

Installation (simple)

1. Upload the provided SMF package zip via Admin → Package Manager.

2. Click Install (hooks + tables are created automatically).

3. Go to Admin → Members → Permissions and enable:

   • Give Karma+ votes

   • See Karma+ scores

   • (Optional) Bypass link limits

4. Configure thresholds in Admin → Configuration → Modification Settings → KarmaPlus.

Performance & Security

• Efficient queries with proper indexes

• Session token protection on vote actions

• Same-origin safe redirects after voting

Use cases 

• “How to add reputation to SMF”

• “SMF upvote downvote plugin”

• “Block links for new users SMF”

• “SMF karma mod 2.1”

• “SMF anti-spam URL restriction”

Version

KarmaPlus v1.8.11

• Initial public release with vote limits, cooldowns, URL blocking by karma/posts, admin settings page, and mini-profile badges.