What is the difference between using a variable function and call_user_func in PHP?

When using a variable function in PHP, you directly call the function using the variable that holds the function name. On the other hand, call_user_func is a built-in PHP function that allows you to call a callback function with a dynamic function name as a string. Using call_user_func can be more flexible as it allows you to pass arguments to the callback function easily. 

// Using a variable function
$myFunction = 'myCallbackFunction';
$myFunction(); // Calls myCallbackFunction

// Using call_user_func
$myFunction = 'myCallbackFunction';
call_user_func($myFunction); // Calls myCallbackFunction

function myCallbackFunction() {
    echo "Hello, World!";
}

Keywords

variable function call_user_func PHP function difference

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