php怎么查询多条数据

php查询多条数据的方法：首先创建一个PHP示例文件；然后创建PHP MySQL连接；最后通过“SELECT id, firstname, lastname FROM MyGuests”语句实现多条数据的查询即可。

本文操作环境：windows7系统、PHP7.1版，DELL G3电脑

PHP+MySQL 原生SQL查询多条数据 (MySQLi – 面向对象）

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

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