What are the potential security risks associated with building a custom PHP script for a community website?

One potential security risk with building a custom PHP script for a community website is the vulnerability to SQL injection attacks if proper input validation and sanitization are not implemented. To mitigate this risk, developers should use prepared statements or parameterized queries to prevent malicious SQL injection attempts. 

// Example of using prepared statements to prevent SQL injection

// Assuming $conn is the database connection object

$stmt = $conn->prepare("SELECT * FROM users WHERE username = ?");
$stmt->bind_param("s", $username);

$username = $_POST['username'];
$stmt->execute();

$result = $stmt->get_result();
while ($row = $result->fetch_assoc()) {
    // Process the data
}

$stmt->close();

Keywords

SQL injection cross-site scripting session hijacking input validation secure coding practices

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