What are some common mistakes to avoid when updating data in a MySQL database using PHP?

One common mistake to avoid when updating data in a MySQL database using PHP is not sanitizing user input, which can lead to SQL injection attacks. To prevent this, you should always use prepared statements with parameterized queries to securely update data in the database. 

// Connect to the database
$mysqli = new mysqli("localhost", "username", "password", "database");

// Check for connection errors
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}

// Prepare the update statement with a parameterized query
$stmt = $mysqli->prepare("UPDATE table_name SET column_name = ? WHERE id = ?");
$stmt->bind_param("si", $new_value, $id);

// Set the values for the parameters and execute the update
$new_value = "new_value";
$id = 1;
$stmt->execute();

// Close the statement and connection
$stmt->close();
$mysqli->close();

Keywords

MySQL PHP data update SQL injection error handling

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