Coding Standards: Use strict null comparison instead of is_null()#12124
Coding Standards: Use strict null comparison instead of is_null()#12124Dervish12 wants to merge 1 commit into
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Replace `is_null( $var )` with `null === $var` and `! is_null( $var )` with `null !== $var` across multiple core files. WordPress Coding Standards prefer strict comparison operators over function calls for type checking. Using `null === $var` is functionally equivalent to `is_null( $var )` but aligns with the Yoda condition style used throughout WordPress core and is more consistent with how other type checks are written (e.g. `false === $var`). This changeset updates 14 core files, excluding third-party libraries and files where polyfill availability is a concern. Props Dervish12. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Replace
is_null( $var )withnull === $varand! is_null( $var )withnull !== $varacross multiple core files.WordPress Coding Standards prefer strict comparison operators over function calls for type checking. Using
null === $varis functionally equivalent tois_null( $var )but:false === $var)Files changed (14 files, 25 replacements)
src/wp-includes/functions.php— 6 instancessrc/wp-includes/blocks/navigation-link.php— 4 instancessrc/wp-includes/blocks.php— 2 instancessrc/wp-includes/post.php— 2 instancessrc/wp-includes/load.php— 2 instancessrc/wp-includes/blocks/icon.php— 1 instancesrc/wp-includes/blocks/template-part.php— 1 instancesrc/wp-includes/formatting.php— 1 instancesrc/wp-includes/http.php— 1 instancesrc/wp-includes/revision.php— 1 instancesrc/wp-includes/class-wp-http-cookie.php— 1 instancesrc/wp-includes/class-wp-http-proxy.php— 1 instancesrc/wp-includes/ms-functions.php— 1 instancesrc/wp-admin/install.php— 1 instanceThird-party libraries and files with polyfill availability concerns were intentionally excluded.
Test plan
is_null())This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.