Twig Filters & Functions

FOSSBilling utilizes the popular twig templating engine for various purposes (front-end, email templates, PDFs, ect). This documentation covers what twig filters FOSSBilling includes so that developers can better understand what's available to work with.

From Twig

FOSSBilling includes all of the default twig filters plus the following additional filters through extensions:

• The Intl Extra Extension (opens in a new tab) & associated filters

Custom

FOSSBilling has quite a few custom filters included in it. Here's the full list of them with further documentation coming in the future:

• trans: The translation filter.
• alink: Accepts a URI and turns it into a link for the administrator panel.
• link: Generates a full link for the FOSSBilling installation off of a URI.
• autolink: Automatically generates an HTML link element.
• gravatar: Accepts an email and optionally size and generates a gravatar image for it.
• markdown: Parses markdown into HTML, escaping HTML and removing unsafe links (javascript:, vbscript:, file:, and most data: links`
  • Follows the CommonMark spec with GitHub markdown extensions enable via the league/commonmark package.
• truncate: Truncates a string down to a given maximum length.
• timeago Accepts a ISO 8601 date format and displays how long ago it was.
• daysleft: Accepts a ISO 8601 date format and displays how many days until that date is reached.
• size: Converts a provided byte count into a human-readable representation (KB, MB, GB, etc).
• ipcountryname: Displays the name of a country associated with a given IP addresses.
• number: Acts as an alias to the PHP function number_format.
• period_title: Displays a translated title for a given period (Example: 1M for 1 month).
• img_tag: Generates an HTML image tag.
• script_tag: Generates an HTML script tag.
• stylesheet_tag: Generates an HTML style-sheet tag to load CSS.
• mod_asset_url: Provides an easy way to generate the correct URL for assets within a given module.
• asset_url: Provides an easy way to generate the correct URL to point to assets in the current theme.
• library_url: Provides an easy way to generate the correct URL to point to the library folder of the FOSSBilling installation.
• money: Formats a price for a given currency.
• money_without_currency: Formats a price for a given currency without displaying the currency symbol.
• money_convert: Like money except it also converts the currency.
• money_convert_without_currency: Like money_without_currency except it also converts the currency.