What are the potential risks of not properly handling errors in PHP database queries?

If errors in PHP database queries are not properly handled, it can lead to security vulnerabilities such as SQL injection attacks, data corruption, and potential loss of sensitive information. To mitigate these risks, it is essential to sanitize user input, use prepared statements, and implement error handling to catch and handle any potential issues that may arise during database operations. 

<?php
// Establish database connection
$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);
}

// Example query with error handling
$sql = "SELECT * FROM users WHERE id = ?";

$stmt = $conn->prepare($sql);
$stmt->bind_param("i", $id);

$id = 1;

if ($stmt->execute()) {
    $result = $stmt->get_result();
    while ($row = $result->fetch_assoc()) {
        // Process data
    }
} else {
    echo "Error: " . $conn->error;
}

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

Keywords

SQL injection PDO error handling exception vulnerability

Related Questions