3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class IncrementIterator implements Iterator { protected $start; protected $end; protected $current; public function __construct($start, $end) { $this->start = $start; $this->end = $end; } public function rewind() { $this->current = $this->start; } public function valid() { return $this->current <= $this->end; } public function key() { return $this->current; } public function current() { return $this->current; } public function next() { $this->current++; } } class NestedIterator implements Iterator { protected $iterators = array(); protected $lastIndex = -1; protected $iteration = 0; public function addIterator(Iterator $it) { $this->iterators[] = $it; $this->lastIndex++; } public function rewind() { foreach ($this->iterators as $it) { $it->rewind(); } $this->iteration = 0; } public function valid() { return $this->lastIndex >= 0 && $this->iterators[0]->valid(); } public function key() { return $this->iteration; } public function current() { $return = array(); foreach ($this->iterators as $it) { $return[] = $it->current(); } return $return; } public function next() { for ($i = $this->lastIndex; $i >= 0; $i--) { $this->iterators[$i]->next(); if (!$this->iterators[$i]->valid()) { continue; } for ($j = $i + 1; $j <= $this->lastIndex; $j++) { $this->iterators[$j]->rewind(); } } } } $nestedIterator = new NestedIterator(); $nestedIterator->addIterator(new IncrementIterator(0, 26)); $nestedIterator->addIterator(new IncrementIterator(0, 26)); $nestedIterator->addIterator(new IncrementIterator(0, 26)); $nestedIterator->addIterator(new IncrementIterator(0, 26)); foreach ($nestedIterator as $current) { list($a, $b, $c, $d) = $current; echo "$a, $b, $c, $d\n"; }
based on noLO6
Output for 5.0.0 - 7.1.0
0, 0, 0, 0 1, 0, 0, 0 2, 0, 0, 0 3, 0, 0, 0 4, 0, 0, 0 5, 0, 0, 0 6, 0, 0, 0 7, 0, 0, 0 8, 0, 0, 0 9, 0, 0, 0 10, 0, 0, 0 11, 0, 0, 0 12, 0, 0, 0 13, 0, 0, 0 14, 0, 0, 0 15, 0, 0, 0 16, 0, 0, 0 17, 0, 0, 0 18, 0, 0, 0 19, 0, 0, 0 20, 0, 0, 0 21, 0, 0, 0 22, 0, 0, 0 23, 0, 0, 0 24, 0, 0, 0 25, 0, 0, 0 26, 0, 0, 0
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/IRaek on line 2
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/IRaek on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/IRaek on line 2
Process exited with code 255.