How can PHP developers ensure that their code is robust and error-free when implementing dynamic features like changing page layouts based on user selections?

To ensure that PHP code is robust and error-free when implementing dynamic features like changing page layouts based on user selections, developers should thoroughly test their code, use proper error handling techniques, and sanitize user input to prevent security vulnerabilities. 

// Example of implementing proper error handling and user input sanitization
$userSelection = $_POST['layout'];

// Sanitize user input
$sanitizedSelection = filter_var($userSelection, FILTER_SANITIZE_STRING);

// Check for valid layout options
$validLayouts = ['layout1', 'layout2', 'layout3'];
if (!in_array($sanitizedSelection, $validLayouts)) {
    // Handle invalid input error
    die('Invalid layout selection');
}

// Proceed with changing page layout based on user selection
// Code to change page layout based on $sanitizedSelection

Keywords

PHP error handling dynamic layouts user selections robustness

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