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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 |
|---|---|
| 4583 | /** |
| 4584 | * Filters whether the post slug would be bad as a flat slug. |
| 4585 | * |
| 4586 | * @since 3.1.0 |
| 4587 | * |
| 4588 | * @param bool $bad_slug Whether the post slug would be bad as a flat slug. |
| 4589 | * @param string $slug The post slug. |
| 4590 | * @param string $post_type Post type. |
| 4591 | */ |
| 4592 | $is_bad_flat_slug = apply_filters( 'wp_unique_post_slug_is_bad_flat_slug', false, $slug, $post_type ); |
| 4593 | |
| 4594 | if ( $post_name_check |
| 4595 | || in_array( $slug, $feeds, true ) || 'embed' === $slug |
| 4596 | || $conflicts_with_date_archive |
| 4597 | || $is_bad_flat_slug |
| 4598 | ) { |
| 4599 | $suffix = 2; |
| 4600 | do { |
| 4601 | $alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix"; |