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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 |
|---|---|
| 4177 | |
| 4178 | /** |
| 4179 | * Filters the permalink structure for a terms before token replacement occurs. |
| 4180 | * |
| 4181 | * @since 4.9.0 |
| 4182 | * |
| 4183 | * @param string $termlink The permalink structure for the term's taxonomy. |
| 4184 | * @param WP_Term $term The term object. |
| 4185 | */ |
| 4186 | $termlink = apply_filters( 'pre_term_link', $termlink, $term ); |
| 4187 | |
| 4188 | $slug = $term->slug; |
| 4189 | $t = get_taxonomy( $taxonomy ); |
| 4190 | |
| 4191 | if ( empty( $termlink ) ) { |
| 4192 | if ( 'category' == $taxonomy ) { |
| 4193 | $termlink = '?cat=' . $term->term_id; |
| 4194 | } elseif ( $t->query_var ) { |
| 4195 | $termlink = "?$t->query_var=$slug"; |