php mysql串連方式pdo用法詳解

$dbh = new PDO('mysql:host=localhost;dbname=access_control', 'root', ''); $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $dbh->exec('set names utf8'); /*添加*/ //$sql = "INSERT INTO `user` SET `login`=:login AND `password`=:password"; $sql = "INSERT INTO `user` (`login` ,`password`)VALUES (:login, :password)"; $stmt = $dbh->prepare($sql); $stmt->execute(array(':login'=>'kevin2',':password'=>'')); echo $dbh->lastinsertid(); /*修改*/ $sql = "UPDATE `user` SET `password`=:password WHERE `user_id`=:userId"; $stmt = $dbh->prepare($sql); $stmt->execute(array(':userId'=>'7', ':password'=>'4607e782c4d86fd5364d7e4508bb10d9')); echo $stmt->rowCount(); /*刪除*/ $sql = "DELETE FROM `user` WHERE `login` LIKE 'kevin_'"; //kevin% $stmt = $dbh->prepare($sql); $stmt->execute(); echo $stmt->rowCount(); /*查詢*/ $login = 'kevin%'; $sql = "SELECT * FROM `user` WHERE `login` LIKE :login"; $stmt = $dbh->prepare($sql); $stmt->execute(array(':login'=>$login)); while($row = $stmt->fetch(PDO::FETCH_ASSOC)){ print_r($row); } print_r( $stmt->fetchAll(PDO::FETCH_ASSOC)); ?> 複製代碼 1、建立串連 $dbh=newPDO('mysql:host=localhost;port=3306; dbname=test',$user,$pass,array( PDO::ATTR_PERSISTENT=>true )); ?> 複製代碼 持久性連結PDO::ATTR_PERSISTENT=>true 2，捕捉錯誤 try{ $dbh=newPDO('mysql:host=localhost;dbname=test',$user,$pass); $dbh->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION); $dbh->exec("SET CHARACTER SET utf8"); $dbh=null; //中斷連線 }catch(PDOException$e){ print"Error!:".$e->getMessage()." "; die(); } ?> 複製代碼 3，pdo事務 try{ $dbh->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION); $dbh->beginTransaction();//開啟事務 $dbh->exec("insertintostaff(id,first,last)values(23,'Joe','Bloggs')"); $dbh->exec("insertintosalarychange(id,amount,changedate) values(23,50000,NOW())"); $dbh->commit();//提交事務 }catch(Exception$e){ $dbh->rollBack();//錯誤復原 echo"Failed:".$e->getMessage(); } ?> 複製代碼 4. 錯誤處理a. 靜默模式(預設模式) try{ $dbh = new PDO($dsn, $user, $password); $sql = 'Select * from city where CountryCode =:country'; $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING); $stmt = $dbh->prepare($sql); $stmt->bindParam(':country', $country, PDO::PARAM_STR); $stmt->execute(); while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) { print $row['Name'] . "/t"; } } // if there is a problem we can handle it here catch (PDOException $e) { echo 'PDO Exception Caught. '; echo 'Error with the database: '; echo 'SQL Query: ', $sql; echo 'Error: ' . $e->getMessage(); } ?> 複製代碼 1，使用 query() $dbh->query($sql); 當$sql 中變數可以用$dbh->quote($params); //逸出字元串的資料 $sql = 'Select * from city where CountryCode ='.$dbh->quote($country); foreach ($dbh->query($sql) as $row) { print $row['Name'] . "/t"; print $row['CountryCode'] . "/t"; print $row['Population'] . "/n"; } ?> 複製代碼 2，使用 prepare, bindParam和 execute [建議用,同時可以用添加、修改、刪除] $dbh->prepare($sql); 產生了個PDOStatement對象 PDOStatement->bindParam() PDOStatement->execute();//可以在這裡放綁定的相應變數 ?> 複製代碼 3、php pdo事務例子 try { $dbh = new PDO('mysql:host=localhost;dbname=test', 'root', ''); $dbh->query('set names utf8;'); $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $dbh->beginTransaction(); $dbh->exec("Insert INTO `test`.`table` (`name` ,`age`)VALUES ('mick', 22);"); $dbh->exec("Insert INTO `test`.`table` (`name` ,`age`)VALUES ('lily', 29);"); $dbh->exec("Insert INTO `test`.`table` (`name` ,`age`)VALUES ('susan', 21);"); $dbh->commit(); } catch (Exception $e) { $dbh->rollBack(); echo "Failed: " . $e->getMessage(); } ?> 複製代碼

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