Question

我在数据库类中使用以下代码来运行PHP应用程序的其余部分的查询：

public function query($sql, $parameters = [])
    {
        try
        {
        $this->setError(false);
        $stmt = $this->getPdo()->prepare($sql); //assign to a variable with a short name
        if ($stmt):
            $x = 1;
            if (count($parameters)):
                foreach($parameters as $parameter):
                    $stmt->bindValue($x, $parameter);
                $x++;
                endforeach;
            endif;
            $stmt->execute();
            $this->setResults($stmt->fetchAll(PDO::FETCH_OBJ));
            $this->setCount($stmt->rowCount());
        endif;
        return $this;
        }
        catch(PDOException $e)
        {
            $this->setError(true);
            throw $e;
        }

}

似乎只能查找SELECT查询。但是，当涉及INSERT，UPDATE或DELETE的SQL语句使用它时，此方法可以正常工作（因为它会对数据库中的数据执行操作），但它会显示一个致命错误，引用未捕获的异常“PDOException”，并显示消息 SQLSTATE [IMSSP]：查询的活动结果不包含任何字段。它表示此行引发异常：

$this->setResults($stmt->fetchAll(PDO::FETCH_OBJ));

是否可以修改上述代码以确定execute（）是执行SELECT还是INSERT / UPDATE / DELETE而只执行SELECT语句的fetchAll（）？

注意：MS SQL Server中使用的数据库

Answer 1

想出来：

public function query($sql, $parameters = [])
{
    try
    {
    $this->setError(false);
    $stmt = $this->getPdo()->prepare($sql); //assign to a variable with a short name
    if ($stmt):
        $x = 1;
        if (count($parameters)):
            foreach($parameters as $parameter):
                $stmt->bindValue($x, $parameter);
            $x++;
            endforeach;
        endif;
        $stmt->execute();
        $this->setCount($stmt->rowCount()); //for INSERT, UPDATE, DELETE stmts this is number of rows that were affected, displays -1 for SELECT stmt
        if ($stmt->rowCount() == -1):       //conditionally do the following if SQL stmt was a SELECT
            $this->setResults($stmt->fetchAll(PDO::FETCH_OBJ));
            $this->setCount($stmt->rowCount()); //overwrite count attribute with number of rows returned by SELECT stmt
        endif;
    endif;
    return $this;
    }
    catch(PDOException $e)
    {
        $this->setError(true);
        throw $e;
    }
}

PHP确定PDO execute（）是返回数据还是执行操作

1 个答案: