What are the methods of php pdo class

php pdo class methods include: 1. exec method; 2. query method; 3. lastInsertId method; 4. setAttribute method, etc.

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Common methods of pdo class:

exec()

query()

lastInsertId()

<?php
$servername = "localhost";
$username = "root";
$password = "133nubia022";
$dbname=&#39;myweb&#39;;

$pdo= new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$pdo->exec(&#39;set names utf8&#39;);

$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_BOTH);

$sql="insert into user(username,age) values(&#39;user123&#39;,&#39;55&#39;)";

if($pdo->exec($sql)){
	$lastid=$pdo->lastInsertId();
	echo "ID为{$lastid}的数据插入成功！";
}
?>

• setAttribute()

---

Set the get mode attribute

<?php
$servername = "localhost";
$username = "root";
$password = "133nubia022";
$dbname=&#39;myweb&#39;;
 

$pdo= new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);

$pdo->exec(&#39;set names utf8&#39;);
$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_ASSOC);

$sql="select * from user";

$smt=$pdo->query($sql);
$rows=$smt->fetchAll();

echo &#39;<pre class="brush:php;toolbar:false">&#39;;
print_r($rows);
echo &#39;

'; ?>

***
Get the index array

<?php
$servername = "localhost";
$username = "root";
$password = "133nubia022";
$dbname=&#39;myweb&#39;;

$pdo= new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$pdo->exec(&#39;set names utf8&#39;);

$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_NUM);

$sql="select * from user";
$smt=$pdo->query($sql);
$rows=$smt->fetchAll();

echo &#39;<pre class="brush:php;toolbar:false">&#39;;
print_r($rows);
echo &#39;

'; ?>

---

##Get the mixed array

<?php
$servername = "localhost";
$username = "root";
$password = "133nubia022";
$dbname=&#39;myweb&#39;;

$pdo= new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$pdo->exec(&#39;set names utf8&#39;);

$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_BOTH);

$sql="select * from user";
$smt=$pdo->query($sql);
$rows=$smt->fetchAll();

echo &#39;<pre class="brush:php;toolbar:false">&#39;;
print_r($rows);
echo &#39;

'; ?>

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