3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php namespace GeneratorExample; function pipe() { $generators = func_get_args(); return function() use ($generators) { $inputs = func_get_args(); foreach ($generators as $g) { $generator = call_user_func_array($g, $inputs); $inputs = [$generator]; } return $generator; }; } $uppercase = function(\Traversable $in) { foreach ($in as $word) { yield strtoupper($word); } }; $reverse = function(\Traversable $in) { foreach ($in as $word) { yield strrev($word); } }; $println = function(\Traversable $in) { foreach ($in as $line) { echo "$line\n"; } }; $words = new \ArrayIterator(["foo", "bar", "baz"]); $p = pipe($uppercase, $reverse, $println); $p($words);
Output for 5.5.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
OOF RAB ZAB
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'strtoupper' (T_STRING) in /in/4dZbp on line 23
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/4dZbp on line 14
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/4dZbp on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/4dZbp on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/4dZbp on line 3
Process exited with code 255.