pdo操作数据库
2022/8/1 2:27:44
本文主要是介绍pdo操作数据库,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
1.连接数据库
/* 通过调用驱动程序创建一个PDO实例 */ $dsn = 'mysql:dbname=lv;host=127.0.0.1'; $user = 'root'; $password = 'root'; try { $pdo = new PDO($dsn, $user, $password); } catch (PDOException $e) { echo 'Connection failed: ' . $e->getMessage(); }
2.查询数据库
/* 通过调用驱动程序创建一个PDO实例 */ $dsn = 'mysql:dbname=lv;host=127.0.0.1'; $user = 'root'; $password = 'root'; try { $pdo = new PDO($dsn, $user, $password); } catch (PDOException $e) { echo 'Connection failed: ' . $e->getMessage(); } $sql = "insert into aaaaa ('name','email') values ('xiaoming','1647114924@qq.com')"; $select = "select * from aaaaa where id=1"; $prepare = $pdo->prepare($select); $request = $prepare->execute(); $a = $prepare->fetch(PDO::FETCH_ASSOC); var_dump($a);
3.删除一条数据
$delete = "delete from bbb where id=1"; $ac = $pdo->exec($delete); if($ac){ echo "删除成功"; }else{ echo "删除失败"; }
4.修改一条数据
$update = "update bbb set name='daming',email='aaa' where id=1"; $ss = $pdo->exec($update); if($ss){ echo "修改成功"; }else{ echo "修改失败"; }
5.增加一条数据
$sql = "insert into bbb (user_name,user_gender) values ('aa44','vv66')"; $pp=$pdo->exec($sql); if($pp){ echo "添加成功"; }else{ echo "添加失败";
6.连接数据库 (增,删,改,查)
/* 通过调用驱动程序创建一个PDO实例 */ $dsn = 'mysql:dbname=lv;host=127.0.0.1'; $user = 'root'; $password = 'root'; try { $pdo = new PDO($dsn, $user, $password); } catch (PDOException $e) { echo 'Connection failed: ' . $e->getMessage(); } //添加一条数据 $sql = "insert into bbb (user_name,user_gender) values ('aa44','vv66')"; $pp=$pdo->exec($sql); if($pp){ echo "添加成功"; }else{ echo "添加失败"; } //查询一条数据 $select = "select * from bbb where id=2"; $prepare = $pdo->prepare($select); $request = $prepare->execute(); $a = $prepare->fetch(PDO::FETCH_ASSOC); var_dump($a); //更新一条数据 $update = "update bbb set name='daming',email='aaa' where id=1"; $ss = $pdo->exec($update); if($ss){ echo "修改成功"; }else{ echo "修改失败"; } //删除一条数据 $delete = "delete from bbb where id=1"; $ac = $pdo->exec($delete); if($ac){ echo "删除成功"; }else{ echo "删除失败"; }
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