Fix idn_to_ascii deprecation warning by using INTL_IDNA_VARIANT_UTS46 by Copilot · Pull Request #887 · jsonrainbow/json-schema

Copilot · 2026-02-15T11:09:33Z

idn_to_ascii() in FormatConstraint::validateInternationalizedHostname() was implicitly using the deprecated INTL_IDNA_VARIANT_2003, causing deprecation warnings in PHP 8.x.

Change

Explicitly specify INTL_IDNA_VARIANT_UTS46 variant:

// Before
$ascii = idn_to_ascii($label);

// After  
$ascii = idn_to_ascii($label, IDNA_DEFAULT, INTL_IDNA_VARIANT_UTS46);

Behavior is unchanged - internationalized hostnames validate identically under UTS46.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

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www.php.net
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This section details on the original issue you should resolve

<issue_title>Deprecation warning in src/JsonSchema/Constraints/Drafts/Draft07/FormatConstraint.php on line 281</issue_title>
<issue_description>The output of phpunit shows the following deprecation
PHP Deprecated:  idn_to_ascii(): INTL_IDNA_VARIANT_2003 is deprecated in /home/runner/work/json-schema/json-schema/src/JsonSchema/Constraints/Drafts/Draft07/FormatConstraint.php on line 281
This should be address as per PHP recommendations whilst the test still remain green.</issue_description>

<agent_instructions>Check the PHP website for the recommended update to the deprecation</agent_instructions>

Comments on the Issue (you are @copilot in this section)

Fixes Deprecation warning in src/JsonSchema/Constraints/Drafts/Draft07/FormatConstraint.php on line 281 #886

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Co-authored-by: DannyvdSluijs <618940+DannyvdSluijs@users.noreply.github.com>

Initial plan

095196b

Copilot AI assigned Copilot and DannyvdSluijs Feb 15, 2026

Copilot started work on behalf of DannyvdSluijs February 15, 2026 11:09 View session

Fix idn_to_ascii deprecation by using INTL_IDNA_VARIANT_UTS46

a1a35e9

Co-authored-by: DannyvdSluijs <618940+DannyvdSluijs@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Fix deprecation warning in FormatConstraint.php~~ Fix idn_to_ascii deprecation warning by using INTL_IDNA_VARIANT_UTS46 Feb 15, 2026

Copilot AI requested a review from DannyvdSluijs February 15, 2026 11:15

Copilot finished work on behalf of DannyvdSluijs February 15, 2026 11:15

DannyvdSluijs added Bug draft-07 labels Feb 15, 2026

DannyvdSluijs marked this pull request as ready for review February 15, 2026 13:37

DannyvdSluijs approved these changes Feb 15, 2026

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DannyvdSluijs merged commit 07d65c5 into main Feb 15, 2026
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DannyvdSluijs deleted the copilot/fix-deprecation-warning-in-formatconstraint branch February 15, 2026 15:04

github-actions bot added a commit that referenced this pull request Feb 15, 2026

docs: Update CHANGELOG.md for PR #887

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Fix idn_to_ascii deprecation warning by using INTL_IDNA_VARIANT_UTS46#887

Fix idn_to_ascii deprecation warning by using INTL_IDNA_VARIANT_UTS46#887
DannyvdSluijs merged 2 commits intomainfrom
copilot/fix-deprecation-warning-in-formatconstraint

Copilot AI commented Feb 15, 2026 •

edited

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Copilot AI commented Feb 15, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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I tried to connect to the following addresses, but was blocked by firewall rules:

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Copilot AI commented Feb 15, 2026 •

edited

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