我很困惑，我应该通过什么才能从所有条款中获得所有帖子？现在我可以通过featured 为了得到所有events, 但如何获取所有事件？我知道我可以摆脱tax_query() 然而，我用它作为参数，在这里我可以传递一定的税，如果不是，我想要所有的帖子。
（我想要的是，如果有一个带有标记（特色）的事件，则显示该事件，如果没有带有标记（特色）的事件，则显示所有事件）
$now = date(\'d-m-Y H:i:s\');
$cat = \'featured\';
$args = array(
\'post_type\' => \'events\',
\'posts_per_page\' => 4,
\'numberposts\' => 4,
\'meta_key\' => \'start_date\',
\'orderby\' => \'meta_value_num\',
\'order\' => \'ASC\',
\'tax_query\' => array(
array(
\'taxonomy\' => \'events_tag\',
\'field\' => \'slug\',
\'terms\' => $cat,
\'operator\' => \'IN\'
),
),
\'meta_query\' => array(
\'relation\' => \'OR\',
array(
\'key\' => \'start_date\',
\'value\' => date(\'Ymd\', strtotime(\'now\')),
\'type\' => \'numeric\',
\'compare\' => \'>=\',
),
array(
\'key\' => \'end_date\',
\'value\' => date(\'Ymd\', strtotime(\'now\')),
\'type\' => \'numeric\',
\'compare\' => \'>=\',
),
),
if (! is_null($cat))
\'tax_query\' => array(
array(
\'taxonomy\' => \'events_tag\',
\'field\' => \'slug\',
\'terms\' => $cat,
\'operator\' => \'IN\'
),
),
);
$wp_query = new WP_Query($args);
最合适的回答,由SO网友:socki03 整理而成
我会先重新组织你的$args 代码使其更有意义。
$now = date(\'d-m-Y H:i:s\');
$cat = \'featured\';
$args = $cat_args = array(
\'post_type\' => \'events\',
\'posts_per_page\' => 4,
\'meta_key\' => \'start_date\',
\'orderby\' => \'meta_value_num\',
\'order\' => \'ASC\',
\'meta_query\' => array(
\'relation\' => \'OR\',
array(
\'key\' => \'start_date\',
\'value\' => date(\'Ymd\', strtotime(\'now\')),
\'type\' => \'numeric\',
\'compare\' => \'>=\',
),
array(
\'key\' => \'end_date\',
\'value\' => date(\'Ymd\', strtotime(\'now\')),
\'type\' => \'numeric\',
\'compare\' => \'>=\',
),
),
);
// Set the $cat_args array to the category tax_query
$cat_args[\'tax_query\'] = array(
array(
\'taxonomy\' => \'events_tag\',
\'field\' => \'slug\',
\'terms\' => $cat,
\'operator\' => \'IN\'
),
);
if ( get_posts( $cat_args ) ) { // See if any category posts exist
$query_args = $cat_args;
} else { // Otherwise, pass original $args
$query_args = $args;
}
// Use the newly set $query_args
$wp_query = new WP_Query($query_args);
