How can the deprecated function mysql_db_query be replaced in PHP when querying a database?

The deprecated function mysql_db_query can be replaced in PHP by using the mysqli extension or PDO (PHP Data Objects) for interacting with a database. Both mysqli and PDO provide more secure and efficient ways to query a database compared to the deprecated mysql extension. 

// Using mysqli extension to query a database
$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);
}

// Query the database
$sql = "SELECT * FROM table_name";
$result = $conn->query($sql);

// Process the query result
if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "Column1: " . $row["column1"]. " - Column2: " . $row["column2"]. "<br>";
    }
} else {
    echo "0 results";
}

// Close connection
$conn->close();

Keywords

mysql_db_query deprecated function replacement PHP database

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