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run code in 150+ php & hhvm versions
Bugs & Features
<?php namespace itertools; function filter(\Traversable $iterator, callable $callback = null) { foreach ($iterator as $key => $val) { if (null !== $callback and $callback($val, $key)) { (yield $key => $val); } else if ($val) { (yield $key => $val); } } } $a = new \ArrayObject(["foo", "bar", 0, "baz"]); foreach (filter($a) as $val) { print_r($val); }
Output for 5.5.0 - 7.1.0
foobarbaz
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$key' (T_VARIABLE) in /in/IpXud on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_VARIABLE in /in/IpXud on line 9
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/IpXud 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/IpXud on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/IpXud on line 3
Process exited with code 255.