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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='myweb';
$pdo= new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$pdo->exec('set names utf8');
$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_BOTH);
$sql="insert into user(username,age) values('user123','55')";
if($pdo->exec($sql)){
$lastid=$pdo->lastInsertId();
echo "ID为{$lastid}的数据插入成功！";
}
?>
Set the get mode attribute
<?php
$servername = "localhost";
$username = "root";
$password = "133nubia022";
$dbname='myweb';
$pdo= new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$pdo->exec('set names utf8');
$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_ASSOC);
$sql="select * from user";
$smt=$pdo->query($sql);
$rows=$smt->fetchAll();
echo '<pre class="brush:php;toolbar:false">';
print_r($rows);
echo '';
?>
***
Get the index array
<?php
$servername = "localhost";
$username = "root";
$password = "133nubia022";
$dbname='myweb';
$pdo= new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$pdo->exec('set names utf8');
$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_NUM);
$sql="select * from user";
$smt=$pdo->query($sql);
$rows=$smt->fetchAll();
echo '<pre class="brush:php;toolbar:false">';
print_r($rows);
echo '';
?>
<?php
$servername = "localhost";
$username = "root";
$password = "133nubia022";
$dbname='myweb';
$pdo= new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
$pdo->exec('set names utf8');
$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_BOTH);
$sql="select * from user";
$smt=$pdo->query($sql);
$rows=$smt->fetchAll();
echo '<pre class="brush:php;toolbar:false">';
print_r($rows);
echo '';
?>
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