<?php
class ColumnFieldsIterator implements IteratorAggregate
{
public function getIterator()
{
return new ArrayIterator(['columns2','columns']);
}
}
class RowFieldsIterator implements IteratorAggregate
{
public function getIterator()
{
return new ArrayIterator(['rows2','rows']);
}
}
class AllIterator implements IteratorAggregate
{
public function getIterator()
{
$iterator = new AppendIterator;
$iterator->append(new ColumnFieldsIterator);
$iterator->append(new RowFieldsIterator);
return $iterator ;
}
}
$all = new AllIterator;
foreach ($all as $v)
{
echo "$k => $v\n";
}
Deprecated: Return type of ColumnFieldsIterator::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rCpnT on line 5
Deprecated: Return type of RowFieldsIterator::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rCpnT on line 13
Deprecated: Return type of AllIterator::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/rCpnT on line 21
Fatal error: Uncaught TypeError: AppendIterator::append(): Argument #1 ($iterator) must be of type Iterator, ColumnFieldsIterator given in /in/rCpnT:24
Stack trace:
#0 /in/rCpnT(24): AppendIterator->append(Object(ColumnFieldsIterator))
#1 /in/rCpnT(32): AllIterator->getIterator()
#2 {main}
thrown in /in/rCpnT on line 24
Process exited with code 255.
Output for 8.0.0 - 8.0.30
Fatal error: Uncaught TypeError: AppendIterator::append(): Argument #1 ($iterator) must be of type Iterator, ColumnFieldsIterator given in /in/rCpnT:24
Stack trace:
#0 /in/rCpnT(24): AppendIterator->append(Object(ColumnFieldsIterator))
#1 /in/rCpnT(32): AllIterator->getIterator()
#2 {main}
thrown in /in/rCpnT on line 24
Process exited with code 255.
Fatal error: Uncaught TypeError: Argument 1 passed to AppendIterator::append() must implement interface Iterator, instance of ColumnFieldsIterator given in /in/rCpnT:24
Stack trace:
#0 /in/rCpnT(24): AppendIterator->append(Object(ColumnFieldsIterator))
#1 /in/rCpnT(32): AllIterator->getIterator()
#2 {main}
thrown in /in/rCpnT on line 24
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Catchable fatal error: Argument 1 passed to AppendIterator::append() must implement interface Iterator, instance of ColumnFieldsIterator given in /in/rCpnT on line 24
Process exited with code 255.