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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 |
|---|---|
| 1875 | /** |
| 1876 | * Filter the fields to select in the terms query. |
| 1877 | * |
| 1878 | * @since 2.8.0 |
| 1879 | * |
| 1880 | * @param array $selects An array of fields to select for the terms query. |
| 1881 | * @param array $args An array of term query arguments. |
| 1882 | * @param string|array $taxonomies A taxonomy or array of taxonomies. |
| 1883 | */ |
| 1884 | $fields = implode( ', ', apply_filters( 'get_terms_fields', $selects, $args, $taxonomies ) ); |
| 1885 | |
| 1886 | $join = "INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id"; |
| 1887 | |
| 1888 | $pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits' ); |
| 1889 | |
| 1890 | /** |
| 1891 | * Filter the terms query SQL clauses. |
| 1892 | * |
| 1893 | * @since 3.1.0 |