Question

我试图获取“ wp_woocommerce_sessions”数据库表中“ session_value”列下所有会话的所有值。

下面的代码可以完成工作，但是由于某种原因将结果重复了6次，所以给我6个数组，它们的内容完全相同。

global $wpdb;
$wooSessions = $wpdb->get_col( "SELECT session_value FROM {$wpdb->prefix}woocommerce_sessions" );
$wooCookies = implode(" ", $wooSessions);

我正在文档中阅读有关OBJECT_K的信息，该文档理论上会丢弃重复的密钥，但我不知道如何应用它。如果我在get_col括号内添加OBJECT_K，则代码将停止工作。

这是输出var_dump（$ wooSessions）;给我：

array(1) { [0]=> string(4366) "a:12:{s:4:"cart";s:2084:"a:2:{s:32:"1b4cfd194c804d1ad422a350aa2a0145…"}

array(1) { [0]=> string(4366) "a:12:{s:4:"cart";s:2084:"a:2:{s:32:"1b4cfd194c804d1ad422a350aa2a0145…"}

array(1) { [0]=> string(4366) "a:12:{s:4:"cart";s:2084:"a:2:{s:32:"1b4cfd194c804d1ad422a350aa2a0145…"}

array(1) { [0]=> string(4366) "a:12:{s:4:"cart";s:2084:"a:2:{s:32:"1b4cfd194c804d1ad422a350aa2a0145…"}

array(1) { [0]=> string(4366) "a:12:{s:4:"cart";s:2084:"a:2:{s:32:"1b4cfd194c804d1ad422a350aa2a0145…"}

array(1) { [0]=> string(4366) "a:12:{s:4:"cart";s:2084:"a:2:{s:32:"1b4cfd194c804d1ad422a350aa2a0145…"}

这是另一个使用session_id和session_key的示例：

global $wpdb;
$wooSessions = $wpdb->get_results( "SELECT DISTINCT session_id, session_key FROM {$wpdb->prefix}woocommerce_sessions GROUP BY session_key" );

哪个返回以下内容：

Array ( [0] => stdClass Object ( [session_id] => 2149 [session_key] => 76f0552cff4af84e1963815c1fc4a14d ) ) 
Array ( [0] => stdClass Object ( [session_id] => 2149 [session_key] => 76f0552cff4af84e1963815c1fc4a14d ) ) 
Array ( [0] => stdClass Object ( [session_id] => 2149 [session_key] => 76f0552cff4af84e1963815c1fc4a14d ) ) 
Array ( [0] => stdClass Object ( [session_id] => 2149 [session_key] => 76f0552cff4af84e1963815c1fc4a14d ) ) 
Array ( [0] => stdClass Object ( [session_id] => 2149 [session_key] => 76f0552cff4af84e1963815c1fc4a14d ) ) 
Array ( [0] => stdClass Object ( [session_id] => 2149 [session_key] => 76f0552cff4af84e1963815c1fc4a14d ) )

这是另一个选择session_id并按session_id分组的示例：

global $wpdb;
$wooSessions = $wpdb->get_results( "SELECT session_id FROM {$wpdb->prefix}woocommerce_sessions GROUP BY session_id" );

这是结果：

Array ( [0] => stdClass Object ( [session_id] => 2149 ) )
Array ( [0] => stdClass Object ( [session_id] => 2149 ) )
Array ( [0] => stdClass Object ( [session_id] => 2149 ) )
Array ( [0] => stdClass Object ( [session_id] => 2149 ) )
Array ( [0] => stdClass Object ( [session_id] => 2149 ) )
Array ( [0] => stdClass Object ( [session_id] => 2149 ) )

有什么想法可以指出正确的方向吗？预先感谢。

$ wpdb-> get_col返回重复的数组

0 个答案: