PDO数据库操作

abstract：//添加操作<?php $db=[ 'type'=>'mysql', 'host'=>'127.0.0.1', 'dbname'=>'whyan', 'charset'=>'uft8', 'user'=&g

//添加操作

<?php

$db=[

'type'=>'mysql',

'host'=>'127.0.0.1',

'dbname'=>'whyan',

'charset'=>'uft8',

'user'=>'root',

'password'=>'root'

];

//创建连接

$dsn="{$db['type']}:host={$db['host']};dbname={$db['dbname']}";

//创建对象

try{

$pdo=new PDO($dsn,$db['user'],$db['password']);

//echo '连接成功!';

}catch(PDOExeception $e){

exit($e->getMessage());

}

//创建SQL语句

$sql="INSERT INTO `member`(`qq`,`nickname`,`password`,`avatar`,`add_time`) VALUES(:qq,:nickname,:password,:avatar,:add_time)";

//创建预处理对象

$stmt=$pdo->prepare($sql);

$qq='13886677309';

$nickname='灰太狼';

$password=md5($qq.'123456');

$avatar='/static/image/a9.png';

$add_time=time();

//绑定参数

$stmt->bindParam(':qq',$qq,PDO::PARAM_STR,10);

$stmt->bindParam(':nickname',$nickname,PDO::PARAM_STR,20);

$stmt->bindParam(':password',$password,PDO::PARAM_STR,10);

$stmt->bindParam(':avatar',$avatar,PDO::PARAM_STR);

$stmt->bindParam(':add_time',$add_time,PDO::PARAM_INT);

//执行

if($stmt->execute()){

if($stmt->rowCount()>0){

echo '添加记录成功!';

}

}

$stmt=null;

$pdo=null;

//更新操作

<?php

$db=[

'type'=>'mysql',

'host'=>'127.0.0.1',

'dbname'=>'whyan',

'charset'=>'uft8',

'user'=>'root',

'password'=>'root'

];

//创建连接

$dsn="{$db['type']}:host={$db['host']};dbname={$db['dbname']}";

//创建对象

try{

$pdo=new PDO($dsn,$db['user'],$db['password']);

//echo '连接成功!';

}catch(PDOExeception $e){

exit($e->getMessage());

}

//创建SQL语句

$sql="UPDATE `member` SET `qq`=:qq,`nickname`=:nickname,`add_time`=:add_time WHERE `uid`=:uid";

//创建预处理对象

$stmt=$pdo->prepare($sql);

$uid=9;

$qq='13886677369';

$nickname='大灰狼';

$add_time=time();

//绑定参数

$stmt->bindParam(':uid',$uid,PDO::PARAM_INT);

$stmt->bindParam(':qq',$qq,PDO::PARAM_STR,10);

$stmt->bindParam(':nickname',$nickname,PDO::PARAM_STR,20);

$stmt->bindParam(':add_time',$add_time,PDO::PARAM_INT);

//执行

if($stmt->execute()){

if($stmt->rowCount()>0){

echo '更新记录成功!';

}else{

exit(print_r($stmt->errorInfo(),true));

}

}

//删除操作

<?php

$db=[

'type'=>'mysql',

'host'=>'127.0.0.1',

'dbname'=>'whyan',

'charset'=>'uft8',

'user'=>'root',

'password'=>'root'

];

//创建连接

$dsn="{$db['type']}:host={$db['host']};dbname={$db['dbname']}";

//创建对象

try{

$pdo=new PDO($dsn,$db['user'],$db['password']);

//echo '连接成功!';

}catch(PDOExeception $e){

exit($e->getMessage());

}

//创建SQL语句

$sql="DELETE FROM `member` WHERE `uid`=:uid";

//创建预处理对象

$stmt=$pdo->prepare($sql);

$uid=8;

//绑定参数

$stmt->bindParam(':uid',$uid,PDO::PARAM_INT);

//执行

if($stmt->execute()){

if($stmt->rowCount()>0){

echo '删除记录成功!';

}else{

exit(print_r($stmt->errorInfo(),true));

}

}

//查看操作

<?php

$db=[

'type'=>'mysql',

'host'=>'127.0.0.1',

'dbname'=>'whyan',

'charset'=>'uft8',

'user'=>'root',

'password'=>'root'

];

//创建连接

$dsn="{$db['type']}:host={$db['host']};dbname={$db['dbname']}";

//创建对象

try{

$pdo=new PDO($dsn,$db['user'],$db['password']);

//echo '连接成功!';

}catch(PDOExeception $e){

exit($e->getMessage());

}

//创建SQL语句

//$sql="SELECT count(*) as total `member` WHERE `uid`>:uid";

$sql="SELECT * FROM `member` WHERE `uid`>:uid";

//创建预处理对象

$stmt=$pdo->prepare($sql);

$uid=2;

//绑定参数

$stmt->bindParam(':uid',$uid,PDO::PARAM_INT);

//执行

if($stmt->execute()){

$rows=$stmt->fetchAll(PDO::FETCH_ASSOC);

foreach ($rows as $row) {

//echo '<pre>',var_export($row,true),'<br>';

echo $row['uid'].$row['qq'].$row['nickname'].date('Y/m/d',$row['add_time']),'<br>';

}

}

//创建SQL语句

$sql="SELECT count(*) FROM `member` WHERE `uid`>:uid";

$stmt=$pdo->prepare($sql);

$uid=2;

//绑定参数

$stmt->bindParam(':uid',$uid,PDO::PARAM_INT);

$stmt->execute();

$total=$stmt->fetchColumn(0);

echo $total;

Correcting teacher：天蓬老师Correction time：2019-08-07 13:25:48
Teacher's summary：PDO中的查询是个重点, 多了解一下