• Enable mod_rewrite for URL Schemes or URL Redirects.
• Ensure AllowOverride All or at least AllowOverride Options FileInfo Limit is set in the server configuration.
• Recommended modules for optimal performance include mod_headers, mod_setenvif, mod_env, mod_deflate, and mod_filter.

• Don't disable default Feature Delegation for settings changed in the bundled web.config file.
• Install the URL Rewrite module, essential for URL Schemes, URL Redirects, and basic security.
• Configure IIS for additional mime-types if needed, as it doesn't serve unrecognized file types by default.

• GD2 (gd) with PNG and JPEG support
• MySQL extension (mysqli or pdo_mysql)
• XML extension (xml)
• Multibyte String (mbstring)
• cURL extension (curl)
• JSON support (usually available by default)
• Sodium (libsodium)
• ZIP extension (zip) if ZIP file support is needed

• posix extension for permission checks
• zlib extension for faster upgrades, compressed backups, and page compression
• ctype extension for slightly faster performance
• IMAP extension (imap) for managing newsletter bounces
• OpenSSL extension (openssl) for encrypted CPFs, DKIM, and SSL certificate expiry checks
• Pspell (pspell) or Enchant (enchant) extensions for spell checking

• File upload size limit of at least 5MB (or higher as needed)
• Maximum execution time of at least 30 seconds
• Memory limit of at least 128MB
• The installer will warn you if any critical functions have been disabled via disable_functions or other PHP modifications. Avoid web hosts that heavily restrict standard PHP functionality.

Support for integrating popular forum software: See our download page for a list of supported forums.

Share login credentials: Login to the Composr site with the same usernames/passwords as your forum.

Share usergroups: Control website access based on someone's forum usergroup.

Emoticon support: The emoticons on your forum will also be used on your website.

(Conversr only)

Virtual Forums: Find posts made since you last visited or within a time frame.

Remembers your unread posts even if you frequently change computers

Recent activity: See what topics you recently read or posted in

Unanswered topics: Find which topics have not yet been answered

RSS and Atom support

The usual: Categories, forums, topics, posts, topic polls, announcements / pinning, sinking, quick reply, topic closing

Forum and Topic tracking: Receive notifications when new posts are made on monitored topics and forums.

Password-protected forums

Present an 'introductory question' which members must answer or agree to before accessing a forum.

Full moderator control: Determine who may moderate what forums.

Inline personal posts: Whisper to members within a public topic; only those members will see the post.

Over 50 bundled emoticons: Also, support for batch importing new ones

Multi-moderation: Record and perform complex routine tasks; make post templates for those tasks.

Mass-moderation: Perform actions on many posts and topics at once.

Post preview: Read a topic's first post directly from the forum-view. Also see the latest posts when making a new post.

Highlight posts as ‘important’

(These features pertain to Conversr only)

Profiles: Browse through and search for members, and view member profiles.

Multiple usergroups: Members can be in an unlimited number of different usergroups. They can also ‘apply’ to join new ones.

Social networking: Create and browse friendships.

Custom profile fields: Allow your members to add extra information which is relevant to your website (or to their subcommunity), and members can set privacy settings on them.

Promotion system: Set up a usergroup rank ladder so members advance the ranks through their rank points. Members can view rank on their profile rank tab including unlocked and unlockable privileges.

Private Topics: A special kind of private messaging system between 2 or more members. Think 'on-site e-mail inbox'.

Invitation-only websites: Restrict registrations from the public; existing members can invite others to join.

Allow members to create and manage clubs (personal usergroups).

Avatars: Include avatars that members can pick from, or allow members to upload their own.

Member signatures, photos, and personal titles

Users online: See which members are currently online (unless they logged in as invisible)

Account pruning: Find and delete unused accounts, or merge duplicate accounts, based on defined criteria.

CSV files: Import and export members using CSV files, including support for automatic creation of custom profile fields and usergroups – great for migrating data

Users can communicate with staff privately through Support Tickets.

Assign to individual staff: Includes the ability for staff members to “take ownership” of raised issues, and for staff to discuss.

Allow users to e-mail in their tickets and replies to a designated e-mail address

Expanded access granting: Grant third party members access to individual tickets.

FAQ integration: Automatically search FAQs before opening a ticket.

Multiple ticket types: Set up different types of support tickets, with different access levels and fine-grained ticket notification settings.

Anonymous posting: Allow staff to post anonymously or as a designated support operator account so that customers don't always expect the same employee to reply.

Merging: If customers open multiple tickets for the same issue, you can merge them.

Closing: Let customers close tickets that are now resolved, or do it yourself.

Filtering: Filter the tickets you see by status and ticket type.

Paid membership: Sell access to sections of your website, or offer member privileges.

Shopping cart for running an online store

Extendable framework: Programmers can easily add new product types to sell, or payment gateways / tax services / shipping providers.

Multiple payment gateways: Accepts payments via PayPal or other gateways developers may add, and manual transactions (cash/cheque).

Invoicing support: Including status tracking and online payment tracking.

Basic accounting support: Input your incoming and outgoing transactions to get a basic ledger, profit-and-loss, and cashflow charting.

Currency conversions: Perform automatic currency conversions within your website pages (requires an API key).

Random quotes: Put random quotes (e.g. testimonials) into your design.

Awards: Showcase your most popular content, and optionally award the submitter with points.

Tags: Set keyword tags for content and display tag clouds.

Recent content: Automatically feature links to your most recent content (via main_multi_content block).

Show website statistics to your visitors (via stats graphs or page hit counters).

Random content: Feature random content from your website specified via a sophisticated filtering language.

Automatically create newsletter issues highlighting your latest content

Double opt-in: Prevent false sign-ups by asking subscribers to confirm their subscriptions.

Host multiple newsletters: Visitors can subscribe to the ones they want.

Flexible mailings: Send out mailings to all members, to different usergroups, or to subscribers of specific newsletters.

Welcome e-mails: Send multiple welcome e-mails to new users automatically, on a configurable schedule (Conversr-only).

Bounce cleanup: Automatically clean out bounces from your e-mail list.

Unsubscribe: Recipients can easily unsubscribe from newsletters through an unsubscribe link provided in the e-mail.

Change settings: Newsletter subscribers can change their subscription settings on-site.

Drip sending: Prevent overwhelming your mail server or outbound limits.

Choose what is searchable

Boolean and full-text modes

Keyword highlighting in results

Search boxes to integrate into your website

Logging/stats

OpenSearch support: Allow users to search from inside their web browser.

Results sorting, and filtering by author and date

Search within downloads: Including support for looking inside archives.

Composr fast custom index: Support full-text searches in instances where your database does not

Multiple types: Each one can specify its own width-by-height (e.g. skyscraper).

Smart banners: Integrate text-banners into your content via keyword detection.

Broad media compatibility: Image banners, external banner rotations, and text banners.

Determine which banners display most often

Run a cross-site banner network

Hit-balancing support: A site on a banner network gets as many inbound hits as it provides outbound clicks.

Targeted advertising: Show different banners to different usergroups.

Track banner performance

Use the banner system to display whole sets of sponsor logos or partners

Supports Geotargeting

Periodic content reviews: Reminders to check (or remove) banners