$db = new mysqli('localhost', 'root', '', 'tran');
$name = 'jack';
$sql_1 = sprintf('INSERT INTO `tb_user` (name)VALUES("%s")',mysql_real_escape_string($name));
$db->query($sql_1);
为什么会出现
Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: Access denied for user 'ODBC'@'localhost'
Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: A link to the server could not be established in
这两个句错误的,我知道如果连不上数据库mysql_real_escape_string是会报错的,但我明明连接上了,
如果换回mysql_connect() mysql_select_db mysql_query()这样的链接就没问题
还有就是我的字段 name 设置的是not null 为什么上面的sql语句执行了抛出 Warning 这样严重的错误还会保存一个空值的?not null 不是不能为空否则不能保存的吗?
回复讨论(解决方案)
mysqli和mysql模块不是一回事。mysql_real_escape_string()需要 mysql_connect()建立的连接。
想实现同样的功能,参见: mysqli_real_escape_string 这个是mysqli模块下的函数。
不过大多数用PDO或者mysqli的查询都会采用类似的方法:
http://www.php.net/manual/zh/mysqli.prepare.php
数据由模块根据类型设置自动转义,像你的C风格写法很少见。
class db_mysqli extends mysqli { private $link; private $result; private $bol=false; function __construct(){ $this->open_link(); } //开启连接 private function open_link(){ $this->link=new mysqli($GLOBALS['HOST'],$GLOBALS['USER'],$GLOBALS['PASSWORD'],$GLOBALS['DBNAME']) or die("数据库连接失败!".mysqli_error()); $this->link->select_db($GLOBALS['DBNAME']) or die("数据库选择失败!".mysqli_error()); $this->link->set_charset("UTF-8"); } //关闭连接 private function close_result(){ //if($this->result){ //$this->result->free_sult();//关闭结果集 //} } public function db_query($sqlstr){ if(empty($this->link)){ $this->open_link(); } $this->result=$this->link->query($sqlstr); if($this->result){ $row=$this->result->fetch_array(); }else { $row=null; } $this->close_result(); return $row; }
我一般是这样写的 ,你写的我看了好像也没什么问题 ,你看一下 ,希望可以帮助你。。。。
mysqli和mysql模块不是一回事。mysql_real_escape_string()需要 mysql_connect()建立的连接。
想实现同样的功能,参见: mysqli_real_escape_string 这个是mysqli模块下的函数。
不过大多数用PDO或者mysqli的查询都会采用类似的方法:
http://www.php.net/manual/zh/mysqli.prepare.php
数据由模块根据类型设置自动转义,像你的C风格写法很少见。
对我很有启发
class db_mysqli extends mysqli { private $link; private $result; private $bol=false; function __construct(){ $this->open_link(); } //开启连接 private function open_link(){ $this->link=new mysqli($GLOBALS['HOST'],$GLOBALS['USER'],$GLOBALS['PASSWORD'],$GLOBALS['DBNAME']) or die("数据库连接失败!".mysqli_error()); $this->link->select_db($GLOBALS['DBNAME']) or die("数据库选择失败!".mysqli_error()); $this->link->set_charset("UTF-8"); } //关闭连接 private function close_result(){ //if($this->result){ //$this->result->free_sult();//关闭结果集 //} } public function db_query($sqlstr){ if(empty($this->link)){ $this->open_link(); } $this->result=$this->link->query($sqlstr); if($this->result){ $row=$this->result->fetch_array(); }else { $row=null; } $this->close_result(); return $row; }
我一般是这样写的 ,你写的我看了好像也没什么问题 ,你看一下 ,希望可以帮助你。。。。
对我很有启发

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