<?php
function decorate(callable $fn, array $decorators, array $arguments = array())
{
foreach (array_reverse($decorators) as $decorator) {
if (is_callable($decorator)) {
$fn = $decorator($fn);
}
}
return call_user_func_array($fn, $arguments);
}
function decorator(callable $decorator)
{
// This function replaces 'trace'
return function($wrapped) use ($decorator) {
// This function replaces the function which 'trace' is used on.
return function() use ($wrapped, $decorator) {
var_dump($wrapped);
$arguments = func_get_args();
return call_user_func($decorator, $wrapped, $arguments);
};
};
}
function _trace(callable $fn, array $arguments)
{
printf("Calling %s with arguments %s\n", print_r($fn, true), print_r($arguments, true));
return call_user_func_array($fn, $arguments);
}
function trace()
{
return decorate('_trace', ['decorator'], func_get_args());
}
function _foo()
{
echo "Foo";
}
function foo()
{
return decorate('_foo', ['trace'], func_get_args());
}
foo();
preferences:
46.36 ms | 402 KiB | 5 Q