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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 |
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2036 |
|
2037 | /** |
2038 | * Filters the SQL JOIN clause for retrieving archives. |
2039 | * |
2040 | * @since 2.2.0 |
2041 | * |
2042 | * @param string $sql_join Portion of SQL query containing JOIN clause. |
2043 | * @param array $parsed_args An array of default arguments. |
2044 | */ |
2045 | $join = apply_filters( 'getarchives_join', '', $parsed_args ); |
2046 |
|
2047 | $output = ''; |
2048 |
|
2049 | $last_changed = wp_cache_get_last_changed( 'posts' ); |
2050 |
|
2051 | $limit = $parsed_args['limit']; |
2052 |
|
2053 | if ( 'monthly' === $parsed_args['type'] ) { |
2054 | $query = "SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date $order $limit"; |