PHP PDO准备语句查询不更新记录

时间:2010-01-23 18:57:44

标签: php pdo prepared-statement

我在使用PHP的PDO对象准备更新语句和更新记录时遇到问题。我已经采用原始SQL查询并在phpMyAdmin中运行它,并将params替换为传递给函数的值。其中按预期更新记录。但是,从脚本运行时它不会更新。它抛出零错误并返回0000的errorInfo()回复,据我所知,PDO的说法一切都很好。我知道PDO对象有效,因为它成功地插入并从数据库中选择记录,包括我想要更新的记录。我知道这个更新功能很难看,我只是在学习PDO。

显然,这是用PHP5编写的,使用PDO。

班级职能:

public function update($tbl_name, $where = null, $what = null)
    {
        if(is_array($where))
        {
            $where_str = 'where ';
            foreach($where as $key => $val)
            {
                $where_str .= "{$key} = ':{$key}' and ";
            }
            $where_str = substr($where_str,0,-5);

            $what_str = 'set ';
            foreach($what as $key => $val)
            {
                $what_str .= "`{$key}` = ':{$key}', ";
            }
            $what_str = substr($what_str,0,-2);

            $query_str = "update {$tbl_name} {$what_str} {$where_str} LIMIT 1;";
            $stmt = $this->dbh->prepare($query_str);
            echo '<pre>'.print_r($stmt, true).'</pre>';
            foreach($what as $key => $val)
            {
                if('date_time' === $key) continue;
                $bind = $stmt->bindValue(":{$key}",$val);
                echo ($bind ? 'true' : 'false')." :{$key}=",$val,'<br/>';
            }
            foreach($where as $key => $val)
            {
                if('date_time' === $key) continue;
                $bind = $stmt->bindValue(":{$key}",$val);
                echo ($bind ? 'true' : 'false')." :{$key} ",$val,'<br/>';
            }
        }else{
            return false;
        }
        $this->dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        $exec = $stmt->execute();
        echo 'exec: '.($exec === true ? 'true:' : 'false:').':'.$exec.'<br/>';

        echo '<pre>';
        $stmt->debugDumpParams();
        echo '</pre>';

        return $stmt->errorInfo();
    }

从会话更新/登录脚本调用:

$where = array(
    'id' => $user['id'],
    );
$what = array(
    'twitter_key'    => $oauth_token,
    'twitter_secret' => $oauth_token_secret
    );

$update = $db->update('users', $where, $what);

在类函数和调用者中输出echos和print_r:

// print_r($stmt = $this->dbh->prepare($query_str)) output:
PDOStatement Object
(
    [queryString] => update users set `twitter_key` = ':twitter_key', `twitter_secret`     = ':twitter_secret' where id = ':id' LIMIT 1;
)

// output from the bing params and execution returns
true :twitter_key=XXXXXXXXXXXXXXXXXXXXXXXXXXXX
true :twitter_secret=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
true :id 20
exec: true:1

// $stmt->debugDumpParams() output: 
SQL: [111] update users set `twitter_key` = ':twitter_key', `twitter_secret` = ':twitter_secret' where id = ':id' LIMIT 1;
Params:  3
Key: Name: [12] :twitter_key
paramno=-1
name=[12] ":twitter_key"
is_param=1
param_type=2
Key: Name: [15] :twitter_secret
paramno=-1
name=[15] ":twitter_secret"
is_param=1
param_type=2
Key: Name: [3] :id
paramno=-1
name=[3] ":id"
is_param=1
param_type=2

// print_r($stmt->errorInfo()) output:
Array
(
    [0] => 00000
)

2 个答案:

答案 0 :(得分:2)

我对PDO知之甚少,但我觉得绑定参数的方式有问题。但是,最简单的方法是查看实际查询。

根据docs,您应该能够在$stmt->queryString中查看生成的查询。现在无法看到,因为您在输出$stmt之后将参数绑定到语句

绑定参数后执行print_r()(或者甚至在执行查询后,我不知道)。你应该得到真正的查询字符串,并找到问题的根源。

答案 1 :(得分:1)

修正了有效的类功能......放置在这里以防万一有人喜欢它,学习,使用或任何东西。

public function update($tbl_name, $where = null, $what = null)
    {
        if(is_array($where) && is_array($what))
        {
            $where_str = 'where ';
            foreach($where as $key => $val)
            {
                $where_str .= "{$key} = :{$key} and ";
            }
            $where_str = substr($where_str,0,-5);

            $what_str = 'set ';
            foreach($what as $key => $val)
            {
                $what_str .= "{$key} = :{$key}, ";
            }
            $what_str = substr($what_str,0,-2);

            $query_str = "update {$tbl_name} {$what_str} {$where_str} LIMIT 1;";
            $stmt = $this->dbh->prepare($query_str);
            foreach($what as $key => $val)
            {
                if('date_time' === $key) continue;
                $bind = $stmt->bindValue(":{$key}",$val);
            }
            foreach($where as $key => $val)
            {
                if('date_time' === $key) continue;
                if('id' === $key)
                {
                    $bind = $stmt->bindValue(":{$key}",$val, PDO::PARAM_INT);
                }else{
                    $bind = $stmt->bindValue(":{$key}",$val);
                }
            }
        }else{
            return false;
        }
        $stmt->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        $exec = $stmt->execute();
        return $stmt->errorInfo();
    }