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run code in 150+ php & hhvm versions
Bugs & Features
<?php function generator_eval(Generator $gen) { foreach ($gen as $k => $v) {} } function words() { foreach (["foo", "bar", "baz"] as $word) { yield $word; } } function uppercase(Traversable $in) { foreach ($in as $word) { yield strtoupper($word); } } function each_println(Traversable $in) { foreach ($in as $line) { echo "$line\n"; } } $stderr = function() { for (;;) { $error = (yield); fwrite(STDERR, "Error! $error\n"); } }; each_println(uppercase(words()));
Output for 5.5.24 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
FOO BAR BAZ
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$word' (T_VARIABLE) in /in/4JWDp on line 11
Process exited with code 255.
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/4JWDp on line 10
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/4JWDp on line 10
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/4JWDp 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/4JWDp on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/4JWDp on line 3
Process exited with code 255.