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<?php class MyIterator implements Iterator { public $var = array(1,2,3); public function __construct($array) { $var = array(1,2,3); if (is_array($array)) { $this->var = $array; } } public function rewind() { echo "rewinding\n"; reset($this->var); } public function current() { $var = current($this->var); echo "current: $var\n"; return $var; } public function key() { $var = key($this->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"; return $var; } } class MyCollection implements IteratorAggregate { /* private $count = 0;*/ /* public function __construct($array) { $var = array(1,2,3); if (is_array($array)) { $this->var = $array; } } */ // Required definition of interface IteratorAggregate public function getIterator() { return new MyIterator($this->var); } /* public function add($value) { $this->var[$this->count++] = $value; }*/ } /*$values = array('value 1','value 2','value 3');*/ $coll = new Mycollection(); Mycollection->getIterator(); foreach ($coll as $key => $val) { echo "key/value: [$key -> $val]\n\n"; } ?>
Output for 8.1.23 - 8.1.28, 8.2.10 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of MyIterator::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/KfCrs on line 19 Deprecated: Return type of MyIterator::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/KfCrs on line 35 Deprecated: Return type of MyIterator::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/KfCrs on line 28 Deprecated: Return type of MyIterator::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/KfCrs on line 41 Deprecated: Return type of MyIterator::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/KfCrs on line 13 Deprecated: Return type of MyCollection::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/KfCrs on line 64 Fatal error: Uncaught Error: Undefined constant "Mycollection" in /in/KfCrs:79 Stack trace: #0 {main} thrown in /in/KfCrs on line 79
Process exited with code 255.
Output for 5.4.0 - 5.4.19
Parse error: syntax error, unexpected '->' (T_OBJECT_OPERATOR) in /in/AgMu3 on line 79
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/AgMu3 on line 79
Process exited with code 255.

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