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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 |
|---|---|
| 4660 | * override this behavior. |
| 4661 | * |
| 4662 | * @since 4.7.4 |
| 4663 | * |
| 4664 | * @link https://core.trac.wordpress.org/ticket/31071 |
| 4665 | * |
| 4666 | * @param stdClass[]|null $months An array of objects with `month` and `year` |
| 4667 | * properties, or `null` for default behavior. |
| 4668 | */ |
| 4669 | $months = apply_filters( 'media_library_months_with_files', null ); |
| 4670 | if ( ! is_array( $months ) ) { |
| 4671 | $months = $wpdb->get_results( |
| 4672 | $wpdb->prepare( |
| 4673 | "SELECT DISTINCT YEAR( post_date ) AS year, MONTH( post_date ) AS month |
| 4674 | FROM $wpdb->posts |
| 4675 | WHERE post_type = %s |
| 4676 | ORDER BY post_date DESC", |
| 4677 | 'attachment' |
| 4678 | ) |