这是我的数据库表“课程”
当我添加多个年龄组和国家/地区的数据时,我想检查它是否已经存在于db
中示例名称不能与同一国家+年龄组合重复
如果name =“sw”,则用户无法再次为2岁时添加国家1或4或5或3
$age1 = explode(",", $age);
$country1 = explode(",", $country);
foreach($age1 as $ages)
{
foreach($country1 as $country2)
{
$where = "find_in_set( $country2,`country`) <> 0 AND find_in_set( $ages,`age`) <> 0 AND `name` = '" . $name . "'";
}
}
请检查以下结果......
var_dump($age);exit;
string '2,1' (length=3)
var_dump($country);exit;
string '1,4,2,3' (length=7)
var_dump$country1
array (size=2)
0 => string '2' (length=1)
1 => string '1' (length=1)
的var_dump($ AGE-1);出口;
array (size=4)
0 => string '1' (length=1)
1 => string '4' (length=1)
2 => string '2' (length=1)
3 => string '3' (length=1)
答案 0 :(得分:0)
这里你使用了两次相同变量的$,这里没有使用它。
$where = $country." IN country AND ".$age." IN age";
$this->db->select("music_lessons","*",$where);
$res = $this->db->getResult();
返回结果行数