<?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();
- Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- string(4) "_foo"
Calling _foo with arguments Array
(
)
Foo
- Output for 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected '[' in /in/6FMeh on line 35
Process exited with code 255. - Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
- Parse error: syntax error, unexpected T_FUNCTION in /in/6FMeh on line 17
Process exited with code 255. - Output for 5.0.0 - 5.0.5
- Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/6FMeh on line 3
Process exited with code 255. - Output for 4.4.2 - 4.4.9
- Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/6FMeh on line 3
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
- Parse error: parse error, unexpected T_STRING, expecting ')' in /in/6FMeh on line 3
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error, expecting `')'' in /in/6FMeh on line 3
Process exited with code 255.
preferences:
224.25 ms | 401 KiB | 357 Q