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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 |
---|---|
4266 | * |
4267 | * @since 4.7.4 |
4268 | * |
4269 | * @link https://core.trac.wordpress.org/ticket/31071 |
4270 | * |
4271 | * @param array|null $months An array of objects with `month` and `year` |
4272 | * properties, or `null` (or any other non-array value) |
4273 | * for default behavior. |
4274 | */ |
4275 | $months = apply_filters( 'media_library_months_with_files', null ); |
4276 | if ( ! is_array( $months ) ) { |
4277 | $months = $wpdb->get_results( |
4278 | $wpdb->prepare( |
4279 | " |
4280 | SELECT DISTINCT YEAR( post_date ) AS year, MONTH( post_date ) AS month |
4281 | FROM $wpdb->posts |
4282 | WHERE post_type = %s |
4283 | ORDER BY post_date DESC |
4284 | ", |