apply.php

<?php
function compose($f, $g) {
  return function() use($f, $g) {
    $args = func_get_args();
    return $f(call_user_func_array($g, $args));
  };
}

function add1($a) {
  return $a + 1;
}

function mult($a, $b) {
  return $a * $b;
}

$foo = compose("add1", "mult");
echo $foo(1,2), "\n";
echo $foo(2,3);
?>