LIKE查询Mysql中的未知错误/数据

Question

我有这个代码

$opslaglimit = 5;

$fag = "dansk";         
$fagquery = "%".ucfirst($fag)."%";
$fagopslag = $db->prepare("
    SELECT 
            *, 
            teacher_opslag.id as mainid, 
            teacher_opslag.created AS opslagcreated, 
            teacher_opslag.subject AS opslagsubject, 
            teacher_opslag.deleted AS maindeleted 
    FROM 
            teacher_opslag 
    WHERE 
            teacher_opslag.subject LIKE ? 
    ORDER BY 
            teacher_opslag.id DESC 
    LIMIT 
            $opslaglimit
"); 
$fagopslag->bind_param("s", $fagquery);
$fagopslag->execute(); 
$fagresult = $fagopslag->get_result(); 
$ensuranced = $fagresult->num_rows;

查询应选择表中存在dansk的所有数据。我的一行可能看起来像Dansk_Engelsk_Svensk。 num_rows返回0.

这是我第一次在LIKE子句中使用WHERE。我不知道为什么当我在db中有3个匹配行时它返回0。

请帮忙，谢谢