What are some common PHP tools or systems that can be used to create and manage online databases?

To create and manage online databases using PHP, some common tools or systems that can be used are MySQL, SQLite, and PostgreSQL. These tools provide functionalities to connect to databases, execute SQL queries, retrieve data, and manage database structures. 

// Example code snippet using MySQL to connect to a database and retrieve data
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
  die("Connection failed: " . $conn->connect_error);
}

// SQL query to retrieve data from a table
$sql = "SELECT * FROM table_name";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
  // Output data of each row
  while($row = $result->fetch_assoc()) {
    echo "id: " . $row["id"]. " - Name: " . $row["name"]. "<br>";
  }
} else {
  echo "0 results";
}

$conn->close();

Keywords

MySQL PDO phpMyAdmin SQL injection database management

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