这与Events Calendar Pro的Filter Bar插件有关。我希望创建一个自定义过滤器，该过滤器允许用户按一年中的月份进行过滤。 理想情况下，它具有“事件输入”方面的完整“复选框”功能，但我很高兴拥有一些单选功能（例如下拉菜单），我可以让过滤器在将来使用从给定的选定月份开始的即将发生的事件。
根据this guide/documentation，毫不奇怪，建议您从现有的过滤器开始，然后从那里进行修改。这就是我所做的。然后尝试将一堆不同的StackOverflow解决方案拼凑在一起，但我现在还不确定什么是对还是错。
实际上，我只是刚开始了解php，尽管奋斗正是我对学习编程的热爱，但我发现自己尤其为此任务而苦苦挣扎。
如果没有别的，没有人能指出我正确的方向吗？ 如果有帮助，请here is指向我正在开发的开发站点上即将到来的日历的列表视图的链接。
这是我到目前为止的内容：
<?php
/**
* Class Tribe__Events__Filterbar__Filters__Month_Of_Year_Custom
*/
class Tribe__Events__Filterbar__Filters__Month_Of_Year_Custom extends Tribe__Events__Filterbar__Filter {
public $type = 'checkbox';
protected function get_values() {
// The time-of-day filter.
$month_of_year_array = array(
__( 'January', 'tribe-events-filter-view' ),
__( 'February', 'tribe-events-filter-view' ),
__( 'March', 'tribe-events-filter-view' ),
__( 'April', 'tribe-events-filter-view' ),
__( 'May', 'tribe-events-filter-view' ),
__( 'June', 'tribe-events-filter-view' ),
__( 'July', 'tribe-events-filter-view' ),
__( 'August', 'tribe-events-filter-view' ),
__( 'September', 'tribe-events-filter-view' ),
__( 'October', 'tribe-events-filter-view' ),
__( 'November', 'tribe-events-filter-view' ),
__( 'December', 'tribe-events-filter-view' ),
);
$month_of_year_values = array();
foreach ( $month_of_year_array as $value => $name ) {
$month_of_year_values[] = array(
'name' => $name,
'value' => $value,
);
}
return $month_of_year_values;
}
protected function setup_join_clause() {
add_filter( 'posts_join', array( 'Tribe__Events__Query', 'posts_join' ), 10, 2 );
global $wpdb;
$values = $this->currentValue;
}
protected function setup_where_clause() {
global $wpdb;
$clauses = array();
$start_date = "{$wpdb->postmeta}.meta_value";
$clauses[] = "(MONTHOFYEAR($start_date) IN ($values))";
foreach ( $this->currentValue as $month_of_year_index ) {
$month_of_year_index = date("m",strtotime($mydate));
}
$this->whereClause .= ' AND (' . implode( ' OR ', $clauses ) . ')';
}
}
new Tribe__Events__Filterbar__Filters__Month_Of_Year_Custom( __( 'Month Custom', 'tribe-events-filter-view' ), 'monthofyearcustom' );
这是我用作起点的“星期几”过滤器：
<?php
/**
* Class Tribe__Events__Filterbar__Filters__Day_Of_Week
*/
class Tribe__Events__Filterbar__Filters__Day_Of_Week extends Tribe__Events__Filterbar__Filter {
public $type = 'checkbox';
protected function get_values() {
$day_of_week_array = array(
__( 'Sunday', 'tribe-events-filter-view' ),
__( 'Monday', 'tribe-events-filter-view' ),
__( 'Tuesday', 'tribe-events-filter-view' ),
__( 'Wednesday', 'tribe-events-filter-view' ),
__( 'Thursday', 'tribe-events-filter-view' ),
__( 'Friday', 'tribe-events-filter-view' ),
__( 'Saturday', 'tribe-events-filter-view' ),
);
// Get WordPress system value for the start of the week, keep in mind that on WordPress it
// starts on 0 instead of 1 like we did above.
$sys_week_start = absint( get_option( 'start_of_week', 0 ) );
$sorted = range( 0, 6 );
// Push the items of the array until the start_of_week to the end
for ( $i = 0; $i < $sys_week_start; $i ++ ) {
array_push( $sorted, array_shift( $sorted ) );
}
$day_of_week_values = array();
foreach ( $sorted as $n ) {
$day_of_week_values[] = array(
'name' => $day_of_week_array[ $n ],
'value' => $n + 1,
);
}
return $day_of_week_values;
}
/**
* Add modifications to the query
*
* @return void
*/
protected function setup_query_filters() {
global $wp_query;
// band-aid for month view
if ( $wp_query->is_main_query() && $wp_query->get( 'eventDisplay' ) == 'month' ) {
$wp_query->set(
'meta_query', array(
array(
'key' => '_EventStartDate',
'type' => 'DATETIME',
),
)
);
}
parent::setup_query_filters();
}
protected function setup_join_clause() {
add_filter( 'posts_join', array( 'Tribe__Events__Query', 'posts_join' ), 10, 2 );
// Default behavior is to *not* force local TZ; so let's reset to the default behavior
// to make sure we don't interfere with queries other than the Day-filter one.
add_filter( 'tribe_events_query_force_local_tz', '__return_false' );
}
protected function setup_where_clause() {
/** @var wpdb $wpdb */
global $wpdb;
$clauses = array();
$values = array_map( 'intval', $this->currentValue );
$values = implode( ',', $values );
$eod_cutoff = tribe_get_option( 'multiDayCutoff', '00:00' );
if ( $eod_cutoff != '00:00' ) {
$eod_time_difference = Tribe__Date_Utils::time_between( '1/1/2014 00:00:00', "1/1/2014 {$eod_cutoff}:00" );
$start_date = "DATE_SUB({$wpdb->postmeta}.meta_value, INTERVAL {$eod_time_difference} SECOND)";
$end_date = "DATE_SUB(tribe_event_end_date.meta_value, INTERVAL {$eod_time_difference} SECOND)";
} else {
$start_date = "{$wpdb->postmeta}.meta_value";
$end_date = 'tribe_event_end_date.meta_value';
}
$clauses[] = "(DAYOFWEEK($start_date) IN ($values))";
// is it on at least 7 days (first day is 0)
$clauses[] = "(DATEDIFF($end_date, $start_date) >=6)";
// determine if the start of the nearest matching day is between the start and end dates
$distance_to_day = array();
foreach ( $this->currentValue as $day_of_week_index ) {
$day_of_week_index = (int) $day_of_week_index;
$distance_to_day[] = "MOD( 7 + $day_of_week_index - DAYOFWEEK($start_date), 7 )";
}
if ( count( $distance_to_day ) > 1 ) {
$distance_to_next_matching_day = 'LEAST(' . implode( ',', $distance_to_day ) . ')';
} else {
$distance_to_next_matching_day = reset( $distance_to_day );
}
$clauses[] = "(DATE(DATE_ADD($start_date, INTERVAL $distance_to_next_matching_day DAY)) < $end_date)";
$this->whereClause = ' AND (' . implode( ' OR ', $clauses ) . ')';
// Forces the query to use _EventStartDate and _EventEndDate as the times to base results
// off of, instead of _EventStartDateUTC, _EventEventDateUTC which can produce weird results.
add_filter( 'tribe_events_query_force_local_tz', '__return_true' );
}
}