我有一个名为 class HelloAction
{
const FIRST = "DEMO";
public static $first = "WORLD";
function __construct($confclassname)
{
$this->config = $confclassname;
# PHP Interpreter throws an Error for These Two Lines
$this->first1 = $confclassname::$a;
$this->first2 = $confclassname::$b;
}
function setFirst($s)
{
self::$first = $s;
}
}
class action1
{
const AAAA = "____Hello World____";
public static $a = "this is an apple";
public static $b = "That is an Dog";
function __construct()
{
$this->second = "hi, there.";
}
}
class action2
{
const AAAA = "___Yeah, Hello World____";
public static $a = "Whare You were...";
public static $b = "Awesome work";
function __construct()
{
}
public static function action21($s)
{
self::$a = $s;
}
public function action22()
{
return self::$a;
}
}
$b1 = new HelloAction('action1');
$b2 = new HelloAction('action2');
echo $b1->first1 . "\n";
echo $b1->first2 . "\n";
?>
的表，其中有一个名为post的列，其中有逗号分隔值。当我显示相应用户的帖子时，我使用了visible_user_ids。
e.g。 FIND_IN_SET()当visible_user_ids列包含逗号分隔的用户ID（例如
FIND_IN_SET('8','visible_user_ids')但是当visible_user_ids列只包含一个值，即8时，它不会显示帖子表记录。
请提出解决方案。 3,5,8
8,5
8,1,12
etc.
是否适用于单一值？