A PHP Error was encountered

Severity: Warning

Message: Invalid argument supplied for foreach()

Filename: controllers/lecview.php

Line Number: 722

Query failed: select a.bbs_id ,a.priority ,a.step+ (nvl(a.priority,0)*10000000000) as step2 ,a.step ,a.fk_user_id ,a.name ,a.depth ,a.file_id ,a.is_open ,to_char(a.created_at,'YYYY-MM-DD') AS created_at ,to_char(a.created_at,'YYYY-MM-DD HH24:MI:SS') AS created_at2 ,(sysdate-a.created_at) as gap ,(select to_char(max(rb.created_at),'YYYY-MM-DD HH24:MI:SS') from bbs rb where rb.parent_bbs_id = a.bbs_id) as reply_at ,a.title ,a.visit ,a.bbs_code ,a.passwd ,a.bcategory_id ,a.likes_count ,'' as bcategory_name ,'' as bcategory_path ,a.parent_bbs_id ,0 as reple_cnt ,0 as comment_cnt ,b.lec_code ,b.star ,b.fk_lms_history_id ,b.essay_qid ,c.lec_title as lecture_name ,CATEGORY_NAME(c.lec_category) as lecture_category ,CATEGORY_VALUE(c.lec_category) as lecture_value ,c.lec_category ,c.fk_tutor_id ,c.lec_info.extract('/lec_info/tutor_text/text()').getStringVal() as tutor_name ,a.view_option_code ,'0' as is_able_to_download ,0 as likes_cnt from lecture_bbs b inner join bbs a on a.bbs_id = b.bbs_id inner join lecture_info c on b.lec_code = c.lec_code where a.bbs_code = ? and a.is_used = ? and a.parent_bbs_id is null and (b.lec_code in )) order by a.created_at desc

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