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run code in 200+ php & hhvm versions
Bugs & Features
<?php class MyIterator implements Iterator { private static $data; private $var = array(1,2,3); private $current; private $rewind; private $key; public function __construct($array = null) { if (is_array($array)) { $this->var = $array; } } public function __set($name, $value) { return $this->var[$name] = $value; } public function __get($name) { if (isset($this->var[$name])) { return $this->var[$name]; } } public function many() { if($this->rewind){ echo 'VAR2' . PHP_EOL; self::$data = array(88,99,11); } return self::$data[$this->key]; } public function manys() { if($this->rewind){ echo 'VAR' . PHP_EOL; self::$data = array(55,66,77); } return self::$data[$this->key]; } public function rewind() { self::$data = null; $this->rewind = 1; echo "rewinding\n"; reset($this->var); } public function current() { $var = current($this->var); $this->current = $var; echo "current: $var\n"; return $var; } public function key() { $var = key($this->var); $this->key = $var; echo "key: $var\n"; return $var; } public function next() { $var = next($this->var); echo "next: $var\n"; return $var; } public function valid() { $key = key($this->var); $var = ($key !== NULL && $key !== FALSE); echo "valid: $var\n"; if(! $var){ $this->rewind = 0; } return $var; } } class foo extends MyIterator{ public function test(){ return $this->many(); } public function test2(){ return $this->manys(); } } $it = new foo(); foreach ($it as $a => $b) { echo PHP_EOL . $it->test() . PHP_EOL . PHP_EOL; echo PHP_EOL . $it->test2() . PHP_EOL . PHP_EOL; print "$a: $b\n"; }
Output for 5.6.30, hhvm-3.15.4 - 3.22.0, 7.0.0 - 7.3.0rc3
rewinding valid: 1 current: 1 key: 0 VAR2 88 VAR 55 0: 1 next: 2 valid: 1 current: 2 key: 1 VAR2 99 VAR 66 1: 2 next: 3 valid: 1 current: 3 key: 2 VAR2 11 VAR 77 2: 3 next: valid: