PHP で効率的なテキスト データベースを探索する: さまざまなデータベースの利点と特性を理解する

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检查连接是否成功
if ($conn->connect_error) {
  die("连接失败: " . $conn->connect_error);
}

// 执行SQL语句
$sql = "SELECT * 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();
?>

<?php
// 打开数据库连接
$db = new SQLite3('mydatabase.db');

// 创建表
$createTable = "CREATE TABLE MyGuests (
  id INTEGER PRIMARY KEY,
  firstname TEXT,
  lastname TEXT
)";

// 查询
$result = $db->query("SELECT * FROM MyGuests");

while ($row = $result->fetchArray()) {
  echo "id: {$row['id']}, Name: {$row['firstname']} {$row['lastname']}";
}

// 关闭连接
$db->close();
?>

<?php
// 创建连接
$m = new MongoClient();

// 选择数据库和集合
$db = $m->mydb;
$collection = $db->mycollection;

// 插入一条数据
$document = array( "title" => "MongoDB", "description" => "database", "likes" => 100 );
$collection->insert($document);

// 查找数据
$cursor = $collection->find();
foreach ($cursor as $document) {
  echo $document["title"] . "
";
}

// 关闭连接
$m->close();
?>