What are the potential pitfalls of not properly handling context switching in PHP when displaying data from a database?

Potential pitfalls of not properly handling context switching in PHP when displaying data from a database include security vulnerabilities such as SQL injection attacks and unintended data exposure. To mitigate these risks, it is crucial to use prepared statements and parameterized queries to properly escape and sanitize user input before executing SQL queries. 

// Establish a database connection
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');

// Prepare a SQL statement with a placeholder
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');

// Bind the parameter and execute the statement
$stmt->bindParam(':username', $_GET['username']);
$stmt->execute();

// Fetch and display the results
while ($row = $stmt->fetch()) {
    echo $row['username'] . '<br>';
}

Keywords

context switching PHP database data display error handling

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