What potential issues can arise from using outdated functions like mysql_db_query in PHP?

Using outdated functions like `mysql_db_query` in PHP can lead to security vulnerabilities as these functions are deprecated and no longer supported in newer versions of PHP. To solve this issue, it is recommended to use the MySQLi or PDO extension for interacting with a MySQL database, as they offer more secure and efficient ways to query the database. 

// Connect to MySQL using MySQLi extension
$mysqli = new mysqli('localhost', 'username', 'password', 'database');

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

// Perform a query using prepared statements
$query = $mysqli->prepare("SELECT * FROM table WHERE column = ?");
$query->bind_param("s", $value);
$query->execute();
$result = $query->get_result();

// Fetch data
while ($row = $result->fetch_assoc()) {
    // Process data
}

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

Keywords

mysql_db_query outdated functions security vulnerabilities deprecated SQL injection

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