php - instr() 查询不工作

Question

$condition = '200,310'; //these are numbers of pages for news to be driven out of

while (list($key,$nesto) = each($pluginid))
{
 $getnm = $DB->query("SELECT articleid, categoryid FROM " . TABLE_PREFIX . "p".$nesto."_newy
                    WHERE lang = '$userlang'
                    AND settings > 0
                    **AND instr(categoryid, $condition)**
                    ORDER BY settings ASC, datecreated DESC");
$rows = $DB->get_num_rows($getnm);
}

此 instr 不工作。任何想法如何使它起作用？ categoryid 包含一个数字。

Answer 1

如果你想检查 categoryid 是否是 $condition 中提供的任何一个，你必须切换参数的位置:

AND instr('$condition', categoryid) > 0