What are the implications of using outdated functions in PHP, such as mysql_db_query?

Using outdated functions like mysql_db_query in PHP can lead to security vulnerabilities and compatibility issues with newer versions of PHP. It is recommended to use modern functions like mysqli_query or PDO for database operations. To solve this issue, update your code to use mysqli_query or PDO functions for interacting with the database. 

// Connect to the database using mysqli
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

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

// Perform a query using mysqli_query
$sql = "SELECT * FROM table";
$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

outdated functions mysql_db_query PHP security vulnerability deprecated

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