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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 |
---|---|
4527 | * Filters whether the post slug would make a bad hierarchical post slug. |
4528 | * |
4529 | * @since 3.1.0 |
4530 | * |
4531 | * @param bool $bad_slug Whether the post slug would be bad in a hierarchical post context. |
4532 | * @param string $slug The post slug. |
4533 | * @param string $post_type Post type. |
4534 | * @param int $post_parent Post parent ID. |
4535 | */ |
4536 | $is_bad_hierarchical_slug = apply_filters( 'wp_unique_post_slug_is_bad_hierarchical_slug', false, $slug, $post_type, $post_parent ); |
4537 |
|
4538 | if ( $post_name_check |
4539 | || in_array( $slug, $feeds, true ) || 'embed' === $slug |
4540 | || preg_match( "@^($wp_rewrite->pagination_base)?\d+$@", $slug ) |
4541 | || $is_bad_hierarchical_slug |
4542 | ) { |
4543 | $suffix = 2; |
4544 | do { |
4545 | $alt_post_name = _truncate_post_slug( $slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix"; |