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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 4665 | * @since 5.1.0 |
| 4666 | * |
| 4667 | * @param string|null $override_slug Short-circuit return value. |
| 4668 | * @param string $slug The desired slug (post_name). |
| 4669 | * @param int $post_ID Post ID. |
| 4670 | * @param string $post_status The post status. |
| 4671 | * @param string $post_type Post type. |
| 4672 | * @param int $post_parent Post parent ID. |
| 4673 | */ |
| 4674 | $override_slug = apply_filters( 'pre_wp_unique_post_slug', null, $slug, $post_ID, $post_status, $post_type, $post_parent ); |
| 4675 | if ( null !== $override_slug ) { |
| 4676 | return $override_slug; |
| 4677 | } |
| 4678 | |
| 4679 | global $wpdb, $wp_rewrite; |
| 4680 | |
| 4681 | $original_slug = $slug; |
| 4682 | |
| 4683 | $feeds = $wp_rewrite->feeds; |