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Package frontmatter
Short Description Fast front matter extraction and strict YAML-subset decoding for PHP, the decoder companion for alto/markdown.
License MIT
Homepage https://github.com/altophp/frontmatter
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Informations about the package frontmatter
ALTO Front Matter
Fast front matter extraction and strict YAML-subset decoding for PHP.
ALTO Front Matter reads the fenced metadata block at the top of a document and returns a typed, read-only accessor. It has no runtime Composer dependencies, does not retain the document body, and rejects unsupported YAML instead of silently reinterpreting it.
The decoder follows the YAML 1.2 core schema over a deliberately strict subset. Its parser is single-pass, reports the first syntax error with a line and column, and is covered by a 100% line-coverage quality gate.
Installation
Install ALTO Front Matter with Composer:
ALTO Front Matter requires PHP 8.4 or later and has no runtime PHP extension or Composer package requirements.
Quick Start
fromString() returns empty metadata when the document has no front matter and
throws when a detected block is malformed. Use fromFile() when the package
should read the file for you.
Documentation
| Guide | Contents |
|---|---|
| Documentation index | Browse the complete guide set |
| Getting started | Read metadata and locate the body |
| Typed metadata | Accessors, defaults, enums, and dates |
| Decoding | The supported YAML subset and raw blocks |
| Rendering | Generate YAML, JSON, and TOML front matter |
| Integration | Decoder and renderer contracts |
| Errors | Exception hierarchy and recovery |
| Design | Guarantees, tradeoffs, and limitations |
Contributing
Contributions of all kinds are welcome. Visit the project on GitHub to report a bug, suggest a feature, or open a pull request.
Before submitting code, run:
Run composer coverage separately to enforce the 100% line-coverage floor.
Support
ALTO Front Matter is open source. You can support its continued development through GitHub Sponsors.
Sharing this package with others or starring it on GitHub is also much appreciated.
License
ALTO Front Matter is released by ALTO PHP under the MIT License.
