PHP入门 - mysqlnumrows
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link: http://www.phprm.com/tag/mysqlnumrows/
items: Warning: mysql_num_rows():

Warning: mysql_num_rows():
type: item
date: 2014-01-14T14:03:50+00:00
description: Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in F:myweblzljcn.php on line 23问题是你的mysql_query()时的sql出现了问题,请仔细查看sql.