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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 1888 | */ |
| 1889 | function get_calendar( $initial = true, $echo = true ) { |
| 1890 | global $wpdb, $m, $monthnum, $year, $wp_locale, $posts; |
| 1891 | |
| 1892 | $key = md5( $m . $monthnum . $year ); |
| 1893 | $cache = wp_cache_get( 'get_calendar', 'calendar' ); |
| 1894 | |
| 1895 | if ( $cache && is_array( $cache ) && isset( $cache[ $key ] ) ) { |
| 1896 | /** This filter is documented in wp-includes/general-template.php */ |
| 1897 | $output = apply_filters( 'get_calendar', $cache[ $key ] ); |
| 1898 | |
| 1899 | if ( $echo ) { |
| 1900 | echo $output; |
| 1901 | return; |
| 1902 | } |
| 1903 | |
| 1904 | return $output; |
| 1905 | } |
| 1906 | |
| Line | Code |
| 2087 | |
| 2088 | if ( $echo ) { |
| 2089 | /** |
| 2090 | * Filters the HTML calendar output. |
| 2091 | * |
| 2092 | * @since 3.0.0 |
| 2093 | * |
| 2094 | * @param string $calendar_output HTML output of the calendar. |
| 2095 | */ |
| 2096 | echo apply_filters( 'get_calendar', $calendar_output ); |
| 2097 | return; |
| 2098 | } |
| 2099 | /** This filter is documented in wp-includes/general-template.php */ |
| 2100 | return apply_filters( 'get_calendar', $calendar_output ); |
| 2101 | } |
| 2102 | |
| 2103 | /** |
| 2104 | * Purge the cached results of get_calendar. |
| 2105 | * |
| 2106 | * @see get_calendar |
| 2107 | * @since 2.1.0 |
| 2108 | */ |
| 2109 | function delete_get_calendar_cache() { |