[wp-trac] [WordPress Trac] #58141: `wp_insert_post` considers `"0"` as empty content.

[WordPress Trac]

#58141: `wp_insert_post` considers `"0"` as empty content.
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 Reporter:  peterwilsoncc                        |       Owner:  (none)
     Type:  defect (bug)                         |      Status:  closed
 Priority:  normal                               |   Milestone:  6.4
Component:  Posts, Post Types                    |     Version:  3.3
 Severity:  normal                               |  Resolution:  worksforme
 Keywords:  has-patch has-unit-tests needs-      |     Focuses:
  testing                                        |
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Comment (by ugyensupport):

 == Bug Report
 === Description
 Describe the bug.

 === Environment
 - WordPress: 6.4-alpha-56442
 - PHP: 8.0.0
 - Server: Apache/2.4.10 (Debian)
 - Database: mysqli (Server: 5.5.59-MariaDB-1~wheezy / Client: 5.5.62)
 - Browser: Chrome 116.0.0.0 (macOS)
 - Theme: Twenty Twenty-One 1.9
 - MU-Plugins: None activated
 - Plugins:
   * WordPress Beta Tester 3.5.3

 === Steps to Reproduce
 1. As the code currently uses loose comparisons, the string "0" is
 considered empty content, to reproduce:
 2. Create a new post
 3. Switch to code editing view
 4. Set the title to 0
 5. Set the content to 0
 6. Attempt to publish the post
 7. WordPress with throw an error: Publishing failed. Content, title and
 excerpt are empty.
 🐞 Bug occurs.: While 0 isn't great content, it is content so WordPress
 should allow the publishing of articles with this. Converting the tests to
 strict checks against an empty string should resolve the issue. and In
 regard to WordPress 6.2 + Twenty Twenty-Three 1.1 It only display the
 content but not title.

 === Expected Results
 1.  ✅ Works perfectly and fixed with 6.4-alpha-56442

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Ticket URL: <https://core.trac.wordpress.org/ticket/58141#comment:10>
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