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，以便仅在满足条件时更新某个字段，下面是我的代码，但我不断收到此错误

错误

{ "error": { "message":SQLSTATE[HY093]: 参数号无效：参数未定义 } }

代码

$ok = 1;

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

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

Answer 1

在串联之间保持空间，

$ok = 1;

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

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

Answer 2

我想你缺少一个空间

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