[wp-trac] [WordPress Trac] #58476: preg_split(): Passing null to parameter #2 ($subject) of type string is deprecated

[WordPress Trac]

#58476: preg_split(): Passing null to parameter #2 ($subject) of type string is
deprecated
-------------------------------+-----------------------------
 Reporter:  KProvance          |      Owner:  (none)
     Type:  defect (bug)       |     Status:  new
 Priority:  normal             |  Milestone:  Awaiting Review
Component:  Posts, Post Types  |    Version:  trunk
 Severity:  normal             |   Keywords:
  Focuses:                     |
-------------------------------+-----------------------------
 == Bug Report
 === Description
 Using the filter hook 'the_content' and passing an empty string or null
 produces the preg_split deprecation notice in the convert_smilies()
 function.

 === Environment
 - WordPress: 6.3-alpha-55892
 - PHP: 8.2.2
 - Server: Apache/2.4.54 (Win64) PHP/8.2.2 mod_fcgid/2.3.10-dev
 - Database: mysqli (Server: 8.0.27 / Client: mysqlnd 8.2.2)
 - Browser: Chrome 114.0.0.0 (Windows 10/11)
 - Theme: Seele 1.1.1
 - MU-Plugins:
   * WP Migrate DB Pro Compatibility 1.1
 - Plugins:
   * bbPress 2.6.9
   * Classic Widgets 0.3
   * Contact Form 7 5.7.7
   * Database Backup for WordPress 2.5.2
   * Envato Market 2.0.8
   * Force Plugin Updates Check 1.0.2
   * Optimize Database after Deleting Revisions 5.0.110
   * Query Monitor 3.12.3
   * Redux Framework 4.4.1.4
   * Regenerate Thumbnails 3.1.5
   * Requite Core 1.1.13
   * Slider Revolution 6.6.14
   * Slider Revolution Paint-Brush Add-On 3.0.4
   * Slider Revolution Particles Effect 3.3.2
   * Slider Revolution Slicey Add-On 3.0.4
   * Theme Check 20230417
   * Ultimate Addons for WPBakery Page Builder 3.19.14
   * WooCommerce 7.7.2
   * WordPress Beta Tester 3.4.1
   * WordPress Importer 0.8.1
   * WPBakery Page Builder 6.13.0
   * WP Crontrol 1.15.2
   * WP Migrate DB Pro 1.8.1
   * WP Migrate DB Pro CLI 1.3.2
   * WP Migrate DB Pro Media Files 1.4.9
   * WP Migrate DB Pro Multisite Tools 1.2

 === Steps to Reproduce
 1. Use this filter, ensuring $content is empty or null: $content =
 apply_filters( 'the_content', $content );

 preg_split(): Passing null to parameter #2 ($subject) of type string is
 deprecated
 wp-includes/formatting.php:3482

 preg_split()
 wp-includes/formatting.php:3482

 convert_smilies()
 wp-includes/class-wp-hook.php:310

 apply_filters('the_content')

 x. 🐞 Bug occurs.

 === Expected Results
 1.  ✅ The filtered content.

 === Actual Results
 1.  ❌ The indicated deprecation error due to preg_split not liking a null
 value.

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Ticket URL: <https://core.trac.wordpress.org/ticket/58476>
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