What are the differences between using call_user_func() and Closure objects for calling functions in PHP?

When calling functions dynamically in PHP, developers often have the option of using `call_user_func()` or `Closure` objects. `call_user_func()` is a more traditional approach that allows you to call a function by passing its name as a string, while `Closure` objects provide a more modern and flexible way to create anonymous functions that can be invoked later. `Closure` objects can capture variables from the surrounding scope, making them useful for creating callbacks or implementing more complex logic. 

// Using call_user_func()
function myFunction($param) {
    echo "Hello, $param!";
}

$functionName = 'myFunction';
call_user_func($functionName, 'World');

// Using Closure objects
$myClosure = function($param) {
    echo "Hello, $param!";
};

$myClosure('World');

Keywords

call_user_func Closure objects functions PHP differences

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