What is the difference between escaping a SQL statement and escaping the actual input data in PHP?

Escaping a SQL statement involves properly formatting the query to prevent SQL injection attacks, while escaping the actual input data in PHP involves sanitizing the input to prevent cross-site scripting (XSS) attacks. To escape a SQL statement, you can use prepared statements or parameterized queries. To escape input data in PHP, you can use functions like `htmlspecialchars` or `mysqli_real_escape_string`. 

// Escaping a SQL statement
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
$stmt->bindParam(':username', $username, PDO::PARAM_STR);
$stmt->execute();

// Escaping input data in PHP
$escaped_input = htmlspecialchars($_POST['input_data']);

Keywords

SQL injection PHP escaping input data security

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