Rumah >pembangunan bahagian belakang >tutorial php >mysql - php中使用PDO查询数据库出错
查询的代码是:
<code>$email=htmlspecialchars($_POST["email"]); if($sql->getData('SELECT * FROM user WHERE email='.$email)==NULL){ </code>
getData的代码是:
<code>public function getData($sql,$type=1){ $data=Array(); $db=$this->db(); $result=$db->query($sql); $sth = $db->prepare($sql); $sth->execute(); if(is_bool($result)) return $result; if($type==1) while($a = $sth->fetch(PDO::FETCH_ASSOC)) $data[]=$a; elseif($type==2) while($a = $sth->fetch(PDO::FETCH_BOTH)) $data[]=$a; if($data) return $data; else return NULL; } </code>
错误提示是:
<code>Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '@gmail.com' at line 1' in D:\phpStudy\WWW\core\mysql\drivers\PDO.php:61 Stack trace: #0 D:\phpStudy\WWW\core\mysql\drivers\PDO.php(61): PDO->query('SELECT * FROM u...') #1 D:\phpStudy\WWW\core\login.php(105): DB_PDO->getData('SELECT * FROM u...') #2 {main} thrown in D:\phpStudy\WWW\core\mysql\drivers\PDO.php on line 61</code>
查询的代码是:
<code>$email=htmlspecialchars($_POST["email"]); if($sql->getData('SELECT * FROM user WHERE email='.$email)==NULL){ </code>
getData的代码是:
<code>public function getData($sql,$type=1){ $data=Array(); $db=$this->db(); $result=$db->query($sql); $sth = $db->prepare($sql); $sth->execute(); if(is_bool($result)) return $result; if($type==1) while($a = $sth->fetch(PDO::FETCH_ASSOC)) $data[]=$a; elseif($type==2) while($a = $sth->fetch(PDO::FETCH_BOTH)) $data[]=$a; if($data) return $data; else return NULL; } </code>
错误提示是:
<code>Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '@gmail.com' at line 1' in D:\phpStudy\WWW\core\mysql\drivers\PDO.php:61 Stack trace: #0 D:\phpStudy\WWW\core\mysql\drivers\PDO.php(61): PDO->query('SELECT * FROM u...') #1 D:\phpStudy\WWW\core\login.php(105): DB_PDO->getData('SELECT * FROM u...') #2 {main} thrown in D:\phpStudy\WWW\core\mysql\drivers\PDO.php on line 61</code>
你需要把email
地址引起来
<code class="php"><?php $email=htmlspecialchars($_POST["email"]); if($sql->getData('SELECT * FROM user WHERE email="'.$email.'"')==NULL){ </code>
这个是你的 SQL 语句语法错误,字符串要用引号括起来:
<code class="php">$pdo->getData("SELECT * FROM `table` WHERE `email` = '{$email}'");</code>
以后遇到这种错误你打印你的语句出来就知道错哪了