In what scenarios would it be advisable to redesign a PHP script that relies on complex dynamic code generation and parsing for better maintainability and error handling?

Complex dynamic code generation and parsing in a PHP script can lead to difficulties in maintaining and debugging the code. It is advisable to redesign the script to improve maintainability and error handling by breaking down the complex code into smaller, more manageable functions, using proper error handling techniques, and implementing clear documentation. This will make the code easier to understand, modify, and troubleshoot in the future.

// Before redesign:
function generateDynamicCode($input) {
    // Complex code generation logic here
    // Dynamic parsing logic here
}

// After redesign:
function generateDynamicCode($input) {
    $generatedCode = generateCode($input);
    $parsedResult = parseCode($generatedCode);
    return $parsedResult;
}

function generateCode($input) {
    // Code generation logic here
    return $generatedCode;
}

function parseCode($code) {
    // Parsing logic here
    return $parsedResult;
}