What potential pitfalls should be considered when trying to update multiple form field labels simultaneously in a database using PHP?

When updating multiple form field labels simultaneously in a database using PHP, potential pitfalls to consider include ensuring that the database connection is secure, handling errors gracefully, and validating user input to prevent SQL injection attacks. It is also important to properly sanitize and escape the input data before updating the database to prevent any security vulnerabilities. 

// Assuming $db is the database connection object

// Sanitize and escape the input data
$newLabel1 = mysqli_real_escape_string($db, $_POST['new_label1']);
$newLabel2 = mysqli_real_escape_string($db, $_POST['new_label2']);
$newLabel3 = mysqli_real_escape_string($db, $_POST['new_label3']);

// Update the form field labels in the database
$query = "UPDATE form_fields SET label = CASE 
            WHEN field_id = 1 THEN '$newLabel1'
            WHEN field_id = 2 THEN '$newLabel2'
            WHEN field_id = 3 THEN '$newLabel3'
          END";
$result = mysqli_query($db, $query);

if ($result) {
    echo "Form field labels updated successfully";
} else {
    echo "Error updating form field labels: " . mysqli_error($db);
}

Keywords

SQL injection prepared statements database transactions error handling form validation

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