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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 |
|---|---|
| 150 | * Filter the taxonomy terms checklist arguments. |
| 151 | * |
| 152 | * @since 3.4.0 |
| 153 | * |
| 154 | * @see wp_terms_checklist() |
| 155 | * |
| 156 | * @param array $args An array of arguments. |
| 157 | * @param int $post_id The post ID. |
| 158 | */ |
| 159 | $args = apply_filters( 'wp_terms_checklist_args', $args, $post_id ); |
| 160 | |
| 161 | extract( wp_parse_args($args, $defaults), EXTR_SKIP ); |
| 162 | |
| 163 | if ( empty($walker) || !is_a($walker, 'Walker') ) |
| 164 | $walker = new Walker_Category_Checklist; |
| 165 | |
| 166 | $descendants_and_self = (int) $descendants_and_self; |
| 167 | |
| 168 | $args = array('taxonomy' => $taxonomy); |