What potential issues can arise when using create_function in PHP code?

One potential issue when using create_function in PHP code is that it is deprecated as of PHP 7.2 and removed in PHP 8. Instead, you should use anonymous functions (closures) which provide a more modern and flexible way to define functions inline.

// Using anonymous functions (closures) instead of create_function
$myFunction = function($param) {
    return $param * 2;
};

// Example usage
echo $myFunction(5); // Output: 10