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[Parsing & Serialization](/categories/parsing) 4. / 5. pear/xml\_xrd ActiveLibrary[Parsing & Serialization](/categories/parsing) pear/xml\_xrd ============= PHP library to parse and generate "Extensible Resource Descriptor (XRD) Version 1.0" files v0.3.1(11y ago)17703[3 PRs](https://github.com/pear/XML_XRD/pulls)1LGPLPHP Since Jul 17Pushed 3y ago2 watchersCompare [ Source](https://github.com/pear/XML_XRD)[ Packagist](https://packagist.org/packages/pear/xml_xrd)[ RSS](/packages/pear-xml-xrd/feed)WikiDiscussions master Synced 1mo ago READMEChangelogDependencies (1)Versions (2)Used By (1) XML\_XRD ======== [](#xml_xrd) PHP library to parse and generate [Extensible Resource Descriptor (XRD) Version 1.0](http://docs.oasis-open.org/xri/xrd/v1.0/xrd-1.0.html) files. It supports loading and saving XML (XRD) and JSON (JRD) markup. XRD and JRD files are used for `.well-known/host-meta` files as standardized in [RFC 6415: Web Host Metadata](http://tools.ietf.org/html/rfc6415). [Webfinger](http://tools.ietf.org/html/draft-ietf-appsawg-webfinger-13), based on JRD, can be used to discover information about users by just their e-mail address, e.g. their OpenID provider URL. The XRD format supercedes the XRDS format defined in XRI 2.0, which is used in the [Yadis communications protocol](http://yadis.org/). Contents - [Examples](#examples) - [Loading XRD files](#loading-xrd-files) - [Load from file](#load-from-file) - [Load from string](#load-from-string) - [Verification](#verification) - [Verify subject](#verify-subject) - [Link finding](#link-finding) - [Get all links](#get-all-links) - [Get link by relation](#get-link-by-relation) - [Get link by relation + optional type](#get-link-by-relation-optional-type) - [Get link by relation + type](#get-link-by-relation-type) - [Get all links by relation](#get-all-links-by-relation) - [Properties](#properties) - [Get a single property](#get-a-single-property) - [Get all properties](#get-all-properties) - [Get all properties of a type](#get-all-properties-of-a-type) - [Working with Links](#working-with-links) - [Accessing link attributes](#accessing-link-attributes) - [Additional link properties](#additional-link-properties) - [Generating XRD files](#generating-xrd-files) - [.well-known/host-meta](#well-known-host-meta) - [Webfinger file](#webfinger-file) - [Error handling](#error-handling) - [TODO](#todo) - [Links](#links) [Examples](#id13) ----------------- [](#examples) ### [Loading XRD files](#id14) [](#loading-xrd-files) #### [Load from file](#id15) [](#load-from-file) ``` ... XRD; require_once 'XML/XRD.php'; $xrd = new XML_XRD(); try { $xrd->loadString($myxrd, 'xml'); } catch (XML_XRD_Exception $e) { die('Loading XRD string failed: ' . $e->getMessage()); } ``` ### [Verification](#id17) [](#verification) #### [Verify subject](#id18) [](#verify-subject) Check if the XRD file really describes the resource/URL that we requested the XRD for: ``` ``` If you want a JSON file for JRD: ``` echo $x->to('json'); ``` #### [Webfinger file](#id34) [](#webfinger-file) ``` ``` [Error handling](#id35) ----------------------- [](#error-handling) When loading a file, exceptions of type `XML_XRD_Exception` may be thrown. All other parts of the code do not throw exceptions but fail gracefully by returning `null`, e.g. when a property does not exist. Using `loadFile()` may result in PHP warnings like: ``` Warning: simplexml_load_file(https://example.org/) failed to open stream: Connection refused ``` This cannot be prevented properly, so you either have to silence it with `@`or fetch the file manually and use `loadString()`. [TODO](#id36) ------------- [](#todo) - XML signature verification - (very optional) XRDS (multiple XRD)? [Links](#id37) -------------- [](#links) - [XRD 1.0 standard specification](http://docs.oasis-open.org/xri/xrd/v1.0/xrd-1.0.html) - [OASIS XRI committee](http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=xri) - [WebFinger protocol draft](http://code.google.com/p/webfinger/wiki/WebFingerProtocol) - [WebFinger: Common Link relations](http://code.google.com/p/webfinger/wiki/CommonLinkRelations) - [More link relations](http://search.cpan.org/~tobyink/WWW-Finger-0.101/lib/WWW/Finger/Webfinger.pm) - [RFC 5785: Defining Well-Known Uniform Resource Identifiers](http://tools.ietf.org/html/rfc5785) - [RFC 6415: Web Host Metadata](http://tools.ietf.org/html/rfc6415) - [WebFinger draft](http://tools.ietf.org/html/draft-ietf-appsawg-webfinger-13) ### Health Score 29 — LowBetter than 59% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity18 Limited adoption so far Community16 Small or concentrated contributor base Maturity53 Maturing project, gaining track record Bus Factor1 Top contributor holds 97.1% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Unknown Total 1 Last Release 4323d ago ### Community Maintainers ![](https://www.gravatar.com/avatar/1323714f58f9144af310e5e4217e61b96ad7c42bc5c93a1f2d97deca95f6f4f8?d=identicon)[ashnazg](/maintainers/ashnazg) ![](https://www.gravatar.com/avatar/a1a2e6fe03f91204de2117430a748a12db2957eb113d4a50fc86d68d3c851e11?d=identicon)[cweiske](/maintainers/cweiske) --- Top Contributors [![cweiske](https://avatars.githubusercontent.com/u/59036?v=4)](https://github.com/cweiske "cweiske (66 commits)")[![till](https://avatars.githubusercontent.com/u/27003?v=4)](https://github.com/till "till (2 commits)") ### Code Quality TestsPHPUnit ### Embed Badge ![Health badge](/badges/pear-xml-xrd/health.svg) ``` [![Health](https://phpackages.com/badges/pear-xml-xrd/health.svg)](https://phpackages.com/packages/pear-xml-xrd) ``` ### Alternatives [masterminds/html5 An HTML5 parser and serializer. 1.8k242.8M229](/packages/masterminds-html5)[sabberworm/php-css-parser Parser for CSS Files written in PHP 1.8k191.2M65](/packages/sabberworm-php-css-parser)[jms/metadata Class/method/property metadata management in PHP 1.8k152.8M88](/packages/jms-metadata)[jms/serializer-bundle Allows you to easily serialize, and deserialize data of any complexity 1.8k89.3M627](/packages/jms-serializer-bundle)[hassankhan/config Lightweight configuration file loader that supports PHP, INI, XML, JSON, and YAML files 97513.5M170](/packages/hassankhan-config)[meyfa/php-svg Read, edit, write, and render SVG files with PHP 54613.9M42](/packages/meyfa-php-svg) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)