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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 |
|---|---|
| 4405 | |
| 4406 | /** |
| 4407 | * Filters the permalink structure for a terms before token replacement occurs. |
| 4408 | * |
| 4409 | * @since 4.9.0 |
| 4410 | * |
| 4411 | * @param string $termlink The permalink structure for the term's taxonomy. |
| 4412 | * @param WP_Term $term The term object. |
| 4413 | */ |
| 4414 | $termlink = apply_filters( 'pre_term_link', $termlink, $term ); |
| 4415 | |
| 4416 | $slug = $term->slug; |
| 4417 | $t = get_taxonomy( $taxonomy ); |
| 4418 | |
| 4419 | if ( empty( $termlink ) ) { |
| 4420 | if ( 'category' === $taxonomy ) { |
| 4421 | $termlink = '?cat=' . $term->term_id; |
| 4422 | } elseif ( $t->query_var ) { |
| 4423 | $termlink = "?$t->query_var=$slug"; |