Passing variable argument list to sprintf()

I would like to write a function that (amongst other things) accepts a variable number of arguments and then passes them to sprintf().

For example:

<?php
function some_func($var) {
  // ...
  $s = sprintf($var, ...arguments that were passed...);
  // ...
}

some_func("blah %d blah", $number);
?>

How do I do this in PHP?

Answer

function some_func() {
    $args = func_get_args();
    $s    = call_user_func_array('sprintf', $args);
}

// or

function some_func() {
    $args = func_get_args();
    $var  = array_shift($args);
    $s    = vsprintf($var, $args);
}

The $args temporary variable is necessary, because func_get_args cannot be used in the arguments list of a function in PHP versions prior to 5.3.