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$where =" aa LIKE aaa";

$where =" aa IN (1,2,3,4)";

我習慣這么寫

最效率的就是一樓老大的寫法，因為這是最原始的sql語法，你再怎么包裝只會給程序多走彎路，因為SQL最終還是會以這種寫法來運行SQL，

$where =" aa IN (1,2,3,4) and bbb IN(2,3,4)";

@琉惗：if ($key['type'] == 'Checkbox' || $key['type'] == 'Linkages'){ $where[] = "`".$key['name']."` = '".$key['value']."'"; }elseif ($key['type'] == 'Linkage' || $key['type'] == 'Radio' || $key['type'] == 'Select'){ $where[] = "`".$key['name']."` = '".$key['value']."'"; }else{ $where[] = "`".$key['name']."` like '%".$key['value']."%'"; }