3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?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 - 7.1.0
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 - 5.2.17
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 - 4.4.1
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.