wordpress查询

Question

如何使用多于1个自定义键/值对从类别查询帖子？

Answer 1

可以包括postmeta几次。

$querystr = " 
    SELECT wposts.* 
    FROM $wpdb->posts wposts, 
     $wpdb->postmeta wpostmeta1, 
     $wpdb->postmeta wpostmeta2 
    WHERE wposts.ID = wpostmeta1.post_id 
    AND wposts.ID = wpostmeta2.post_id 
    AND wpostmeta1.meta_key = 'tag' 
    AND wpostmeta1.meta_value = 'email' 
    AND wpostmeta2.meta_key = 'anothertag' 
    AND wpostmeta2.meta_value = 'anothervalue' 
    AND wposts.post_status = 'publish' 
    AND wposts.post_type = 'post' 
    ORDER BY wposts.post_date DESC 
"; 

$pageposts = $wpdb->get_results($querystr, OBJECT); 

Answer 2

有很多信息this here

例如...

$querystr = " 
    SELECT wposts.* 
    FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta 
    WHERE wposts.ID = wpostmeta.post_id 
    AND wpostmeta.meta_key = 'tag' 
    AND wpostmeta.meta_value = 'email' 
    AND wposts.post_status = 'publish' 
    AND wposts.post_type = 'post' 
    ORDER BY wposts.post_date DESC 
"; 

$pageposts = $wpdb->get_results($querystr, OBJECT); 

Answer 3

$query = "SELECT * FROM dishes " ; 

$return = $db->query($query) ;