How can SQL injection vulnerabilities be mitigated in PHP scripts like the one provided in the forum thread?

SQL injection vulnerabilities can be mitigated in PHP scripts by using prepared statements with parameterized queries. This ensures that user input is treated as data rather than executable SQL code, preventing malicious queries from being injected into the database. 

// Original vulnerable code
$sql = "SELECT * FROM users WHERE username = '" . $_POST['username'] . "' AND password = '" . $_POST['password'] . "'";
$result = $conn->query($sql);

// Mitigated code using prepared statements
$stmt = $conn->prepare("SELECT * FROM users WHERE username = ? AND password = ?");
$stmt->bind_param("ss", $_POST['username'], $_POST['password']);
$stmt->execute();
$result = $stmt->get_result();

Keywords

SQL injection PHP scripts mitigation security prepared statements

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