What are the potential pitfalls of using MySQL data directly in JavaScript?

One potential pitfall of using MySQL data directly in JavaScript is the risk of exposing sensitive information or vulnerabilities such as SQL injection attacks. To mitigate this risk, it is recommended to use PHP as an intermediary to handle database queries and sanitize user input before passing data to JavaScript. 

<?php
// Connect to MySQL database
$connection = mysqli_connect("localhost", "username", "password", "database");

// Query database for data
$query = "SELECT * FROM table";
$result = mysqli_query($connection, $query);

// Fetch data and encode as JSON
$data = array();
while ($row = mysqli_fetch_assoc($result)) {
    $data[] = $row;
}
$json_data = json_encode($data);

// Pass data to JavaScript
echo "<script>var jsonData = " . $json_data . ";</script>";

// Close database connection
mysqli_close($connection);
?>

Keywords

MySQL JavaScript security vulnerabilities SQL injection data sanitization

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