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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 4 times in this file.
Line | Code |
---|---|
1060 | */ |
1061 | function get_calendar($initial = true, $echo = true) { |
1062 | global $wpdb, $m, $monthnum, $year, $wp_locale, $posts; |
1063 |
|
1064 | $cache = array(); |
1065 | $key = md5( $m . $monthnum . $year ); |
1066 | if ( $cache = wp_cache_get( 'get_calendar', 'calendar' ) ) { |
1067 | if ( is_array($cache) && isset( $cache[ $key ] ) ) { |
1068 | if ( $echo ) { |
1069 | echo apply_filters( 'get_calendar', $cache[$key] ); |
1070 | return; |
1071 | } else { |
1072 | return apply_filters( 'get_calendar', $cache[$key] ); |
1073 | } |
1074 | } |
1075 | } |
1076 |
|
1077 | if ( !is_array($cache) ) |
1078 | $cache = array(); |
1079 |
|
1080 | // Quick check. If we have no posts at all, abort! |
1081 | if ( !$posts ) { |
Line | Code |
1249 | if ( $pad != 0 && $pad != 7 ) |
1250 | $calendar_output .= "\n\t\t".'<td class="pad" colspan="'. esc_attr($pad) .'"> </td>'; |
1251 |
|
1252 | $calendar_output .= "\n\t</tr>\n\t</tbody>\n\t</table>"; |
1253 |
|
1254 | $cache[ $key ] = $calendar_output; |
1255 | wp_cache_set( 'get_calendar', $cache, 'calendar' ); |
1256 |
|
1257 | if ( $echo ) |
1258 | echo apply_filters( 'get_calendar', $calendar_output ); |
1259 | else |
1260 | return apply_filters( 'get_calendar', $calendar_output ); |
1261 |
|
1262 | } |
1263 |
|
1264 | /** |
1265 | * Purge the cached results of get_calendar. |
1266 | * |
1267 | * @see get_calendar |
1268 | * @since 2.1.0 |
1269 | */ |