Show literal "true"/"false" for boolean config values instead of "1"/empty string

[Copilot]

PHP boolean constants in wp-config.php were displayed as 1 (true) or empty string (false) in wp config get and wp config list, making it impossible to distinguish false from an empty string value.

Changes

• list_(): Convert boolean values to "true"/"false" strings before format_items(), skipping json and yaml formats which represent booleans natively
• get(): Same boolean-to-string conversion for non-json/non-yaml formats
• print_dotenv(): Explicit boolean handling outputs unquoted true/false (e.g. WP_DEBUG=true) before the single-quote escaping path

Before / After

# Before
$ wp config get WP_DEBUG_DISPLAY
           ← empty string for false

$ wp config list
WP_DEBUG        1       constant
WP_DEBUG_DISPLAY        constant

# After
$ wp config get WP_DEBUG_DISPLAY
false

$ wp config list
WP_DEBUG        true    constant
WP_DEBUG_DISPLAY  false   constant

JSON and YAML output formats are unchanged — they continue to emit native boolean types (true/false without quotes).

Test coverage

• Updated existing dotenv format scenario: WP_ALLOW_MULTISITE=1 → true, SUBDOMAIN_INSTALL='' → false
• New config-get-field scenarios covering boolean true/false output and JSON format preservation
• New config-list scenarios covering table, JSON (native booleans preserved), and dotenv formats

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:

• api.wordpress.org
  • Triggering command: /usr/bin/curl curl -s REDACTED (dns block)
• downloads.wordpress.org
  • Triggering command: /usr/bin/curl curl -sSfL REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Show literal "true"/"false" when reading boolean values instead of an empty string</issue_title>
<issue_description>## Feature Request

• Yes, I reviewed the contribution guidelines.

Describe your use case and the problem you are facing

Running wp config list or wp config get, boolean values are shown as 1 / empty string.

$ wp config list
name    value   type
...
WP_DEBUG        1       constant
WP_DEBUG_LOG    1       constant
WP_DEBUG_DISPLAY                constant

$ wp config get WP_DEBUG_DISPLAY

Describe the solution you'd like

Instead of echoing directly the boolean value, resulting in 1 / nothing, boolean values should be considered strictly and shown as true / false, i.e.

$ wp config list
name    value   type
...
WP_DEBUG        true       constant
WP_DEBUG_LOG    true       constant
WP_DEBUG_DISPLAY   false             constant

$ wp config get WP_DEBUG_DISPLAY
false

In this way we could understand better if we set really a false value or an empty string instead.</issue_description>

<agent_instructions>Use #182 as inspiration. Add comprehensive Behat test coverage.</agent_instructions>

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

• Fixes Show literal "true"/"false" when reading boolean values instead of an empty string #165

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!