在mysql查询中添加php if条件

Question

我正在尝试向mysql查询添加一个if条件，只在满足条件时才更新某个字段，这里是我的代码，但我一直收到此错误

错误

  

{＆＃34;错误＆＃34;：{＆＃34;消息＆＃34;：SQLSTATE [HY093]：参数号无效：   参数未定义}}

CODE

$ok = 1;

$sql = "UPDATE users SET
        fn  = :first,
        ln  = :last
        ";
    if($ok == 1){
        $sql .= ",phone = :phone";
    }

$sql .= "WHERE users.id = :id";

Answer 1

在连接之间保持空间，

$ok = 1;

$sql = "UPDATE users SET
        fn  = :first,
        ln  = :last";
    if($ok == 1){
        $sql .= ", phone = :phone ";
    }

$sql .= " WHERE users.id = :id";

Answer 2

我认为你错过了一个空间

$sql =
"UPDATE users SET
    fn  = :first,
    ln  = :last
    ,phone = :phoneWHERE users.id = :id"