What is the WordPress `wp_unique_post_slug` filter and what problem does it solve for programmatic post creation?

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WordPress Expert — Hard

What is the WordPress `wp_unique_post_slug` filter and what problem does it solve for programmatic post creation?

Key points

  • wp_unique_post_slug filter customizes post slugs
  • Ensures controlled slugs for programmatically created posts
  • Overrides WordPress's default duplicate-slug resolution
  • Used for predictable, custom slug strategies

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