Collection
Collection
<?php
//1.创建PDO对象
//$sql="SELECT * FROM `staff` WHERE `id`=:id ";//sql语句模板
// $sql = "SELECT * FROM `staff` WHERE `id`= :id ";
// $sql="select * from staff where id=:id";
$sql="SELECT `id`,`name`,`sex` FROM staff where `id` BETWEEN :start AND :stop ";
$dsn='mysql:host=127.0.0.1;dbname=test';
$username='root';
$passod='root';
// $pdo=new PDO($dsn,$username,$passod);
try {
$pdo=new PDO('mysql:host=127.0.0.1;dbname=test','root','root');
} catch (PDOException $e) {
exit('PDO连接错误'.$e->getMessage());
}
// $c=$pdo->query($sql);
// var_dump($c);
/* foreach ($c as $row) {
echo $row['name'].'=>'.$row['position'].'<br>';
}*/
//2.调用 prepare()创建预处理对象
$st=$pdo->prepare($sql);
var_dump($st);
$st->bindParam('start',$start,PDO::PARAM_INT);
$st->bindParam('stop',$stop,PDO::PARAM_INT);
$st->bindColumn('id',$id,PDO::PARAM_INT);
$st->bindColumn('name',$name,PDO::PARAM_STR,15);
$st->bindColumn('sex',$sex,PDO::PARAM_INT);//bindColum将结果集中的列绑定到指定变量中
/*$start=1;
$stop=3;*/
echo '<br>';
$st->execute(['start'=>1,'stop'=>3]);
//echo $st->debugDumpParams();
/* while ($row=$st->fetch(PDO::FETCH_ASSOC)) {
echo '<br>'.print_r($row,true);
}*/
/* $rows=$st->fetchAll(PDO::FETCH_ASSOC);
foreach ($rows as $row) {
echo '<pre>'.print_r($row,true).'<br>';
}*/
while ($st->fetch(PDO::FETCH_BOUND)) {
//PDO::FETCH_BOUND 指定获取方式将结果集中的列绑定到指定变量中
echo 'id='.$id.'name='.$name.'sex='.$sex.'<br>';
}
//$id=3;
//$st->bindParam('id',$id,PDO::PARAM_INT);
//PDO::PARAM_INT,整数；定义PDO模板参数数据类型，默认为字符串。
//$st->bindValue('id',$id,PDO::PARAM_INT);//bindvalue不支持$id动态设置，bindParam支持$id动态设置
//$st->execute();
//$result=$st->fetch(PDO::FETCH_ASSOC);
//print_r($result);
//查看预处理对象
//var_dump($st);
/*echo "<hr>";
$id=2;
$st->execute();
$result=$st->fetch(PDO::FETCH_ASSOC);
print_r($result);*/
//3.关闭PDO对象
$pdo=null;
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
</body>
</html>
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