What are some best practices for implementing a system to replace keywords with functions in PHP?

When implementing a system to replace keywords with functions in PHP, it is important to create a mapping of keywords to corresponding functions. This can be achieved using an associative array where the keys are the keywords and the values are the function names. Then, when processing input, you can check if the input contains any of the keywords and replace them with the corresponding functions. 

// Define a mapping of keywords to functions
$keywordMapping = [
    'add' => 'addFunction',
    'subtract' => 'subtractFunction',
    'multiply' => 'multiplyFunction',
    'divide' => 'divideFunction'
];

// Process input and replace keywords with functions
$input = "add(2, 3)";
foreach ($keywordMapping as $keyword => $function) {
    if (strpos($input, $keyword) !== false) {
        $input = str_replace($keyword, $function, $input);
    }
}

// Execute the processed input
eval("\$result = $input;");
echo $result;

Keywords

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