PHP MySQL membaca data

Instance (PDO)

<?php
echo "<table style='border: solid 1px black;'>";
echo "<tr><th>Id</th><th>Firstname</th><th>Lastname</th><th>Email</th><th>Reg date</th></tr>";
class TableRows extends RecursiveIteratorIterator {
    function __construct($it) { 
       parent::__construct($it, self::LEAVES_ONLY); 
    }
    function current() {
       return "<td style='width: 150px; border: 1px solid black;'>" .parent::current(). "</td>";
    }
    function beginChildren() { 
       echo "<tr>"; 
    } 
    function endChildren() { 
        echo "</tr>" . "\n";
    } 
} 
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDBPDO";
try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $stmt = $conn->prepare("SELECT * FROM MyGuests"); 
    $stmt->execute();
    // 设置结果集为关联数组
    $result = $stmt->setFetchMode(PDO::FETCH_ASSOC); 
    foreach(new TableRows(new RecursiveArrayIterator($stmt->fetchAll())) as$k=>$v) { 
        echo $v;
    }
    $dsn = null;
}
catch(PDOException $e)
{
    echo "Error: " . $e->getMessage();
}
$conn = null;
echo "</table>";
?>

Meneruskan pembelajaran

fail baharu

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<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";
// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检测连接
if ($conn->connect_error) {
 die("连接失败: " . $conn->connect_error);
} 
$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
 // 输出每行数据
 while($row = $result->fetch_assoc()) {
 echo "<br> id: ". $row["id"]. " - Name: ". $row["firstname"]. " " . $row["lastname"];
 }
} else {
 echo "0 个结果";
}
$conn->close();
?>
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