How can the code be modified to handle errors more effectively when interacting with a MySQL database?

When interacting with a MySQL database, it is important to handle errors effectively to prevent unexpected behavior or security vulnerabilities. One way to do this is by implementing error handling using try-catch blocks in PHP. By wrapping database queries within a try block and catching any exceptions that may occur, you can handle errors gracefully and display appropriate error messages to the user. 

<?php
// Connect to MySQL database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    
    // Perform database query
    $stmt = $conn->prepare("SELECT * FROM table");
    $stmt->execute();
    
    // Fetch results
    $results = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    // Display results
    foreach($results as $row) {
        echo $row['column'] . "<br>";
    }
} catch(PDOException $e) {
    echo "Error: " . $e->getMessage();
}

// Close database connection
$conn = null;
?>

Keywords

PHP MySQL error handling try-catch PDO

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