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<?php // Everything you enter here will be executed by our servers. Try it! function iterator_compose(\Traversable $source, $steps) { $gen = $source; foreach ($steps as $step) { if (is_array($step) and !is_callable($step)) { $g = array_shift($step); array_unshift($step, $gen); if (class_exists($g)) { $class = new \ReflectionClass($className); $gen = $class->newInstanceArgs($step); } else if (is_callable($g)) { $gen = call_user_func_array($g, $step); } } else if (is_callable($step)) { $gen = $step($gen); } } return $gen; } function iterator_chunk(\Traversable $it, $chunkSize) { $it->rewind(); $chunk = []; $steps = range(1, $chunkSize); while (true) { foreach ($steps as $_) { if (!$it->valid()) { break 2; } $chunk[] = $it->current(); $it->next(); } yield $chunk; $chunk = []; } if ($chunk) { yield $chunk; } } $steps = [ function($it) { foreach ($it as $val) { yield chr($val); } }, ["iterator_chunk", 32], ]; $it = iterator_compose(new \ArrayIterator(range(0, 127)), $steps); foreach ($it as $i => $c) { echo "====== Chunk $i ======\n"; var_export($c); echo "\n"; }
Output for 5.5.24 - 5.5.35, 5.6.7 - 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
====== Chunk 0 ====== array ( 0 => '' . "\0" . '', 1 => '', 2 => '', 3 => '', 4 => '', 5 => '', 6 => '', 7 => '', 8 => '', 9 => ' ', 10 => ' ', 11 => ' ', 12 => ' ', 13 => ' ', 14 => '', 15 => '', 16 => '', 17 => '', 18 => '', 19 => '', 20 => '', 21 => '', 22 => '', 23 => '', 24 => '', 25 => '', 26 => '', 27 => '', 28 => '', 29 => '', 30 => '', 31 => '', ) ====== Chunk 1 ====== array ( 0 => ' ', 1 => '!', 2 => '"', 3 => '#', 4 => '$', 5 => '%', 6 => '&', 7 => '\'', 8 => '(', 9 => ')', 10 => '*', 11 => '+', 12 => ',', 13 => '-', 14 => '.', 15 => '/', 16 => '0', 17 => '1', 18 => '2', 19 => '3', 20 => '4', 21 => '5', 22 => '6', 23 => '7', 24 => '8', 25 => '9', 26 => ':', 27 => ';', 28 => '<', 29 => '=', 30 => '>', 31 => '?', ) ====== Chunk 2 ====== array ( 0 => '@', 1 => 'A', 2 => 'B', 3 => 'C', 4 => 'D', 5 => 'E', 6 => 'F', 7 => 'G', 8 => 'H', 9 => 'I', 10 => 'J', 11 => 'K', 12 => 'L', 13 => 'M', 14 => 'N', 15 => 'O', 16 => 'P', 17 => 'Q', 18 => 'R', 19 => 'S', 20 => 'T', 21 => 'U', 22 => 'V', 23 => 'W', 24 => 'X', 25 => 'Y', 26 => 'Z', 27 => '[', 28 => '\\', 29 => ']', 30 => '^', 31 => '_', ) ====== Chunk 3 ====== array ( 0 => '`', 1 => 'a', 2 => 'b', 3 => 'c', 4 => 'd', 5 => 'e', 6 => 'f', 7 => 'g', 8 => 'h', 9 => 'i', 10 => 'j', 11 => 'k', 12 => 'l', 13 => 'm', 14 => 'n', 15 => 'o', 16 => 'p', 17 => 'q', 18 => 'r', 19 => 's', 20 => 't', 21 => 'u', 22 => 'v', 23 => 'w', 24 => 'x', 25 => 'y', 26 => 'z', 27 => '{', 28 => '|', 29 => '}', 30 => '~', 31 => '', )
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$chunk' (T_VARIABLE) in /in/vCWqo on line 43
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/vCWqo on line 30
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/vCWqo on line 4 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/vCWqo on line 14 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/vCWqo on line 27 Parse error: syntax error, unexpected '[' in /in/vCWqo on line 30
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/vCWqo on line 4 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/vCWqo on line 14 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/vCWqo on line 27 Parse error: parse error, unexpected '[' in /in/vCWqo on line 30
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/vCWqo on line 4 Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/vCWqo on line 4
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
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/vCWqo on line 4 Parse error: parse error, unexpected T_STRING, expecting ')' in /in/vCWqo on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/vCWqo on line 4 Parse error: parse error, expecting `')'' in /in/vCWqo on line 4
Process exited with code 255.
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