AppendIterator::__construct
(PHP 5 >= 5.1.0, PHP 7)
AppendIterator::__construct — Constructs an AppendIterator
Description
public AppendIterator::__construct ( void )
Constructs an AppendIterator.
Parameters
This function has no parameters.
Return Values
No value is returned.
Examples
Example #1 Iterating AppendIterator with foreach
<?php
$pizzas???=?new?ArrayIterator(array('Margarita',?'Siciliana',?'Hawaii'));
$toppings?=?new?ArrayIterator(array('Cheese',?'Anchovies',?'Olives',?'Pineapple',?'Ham'));
$appendIterator?=?new?AppendIterator;
$appendIterator->append($pizzas);
$appendIterator->append($toppings);
foreach?($appendIterator?as?$key?=>?$item)?{
????echo?$key?.?'?=>?'?.?$item?.?PHP_EOL;
}
?>The above example will output:
0 => Margarita
1 => Siciliana
2 => Hawaii
0 => Cheese
1 => Anchovies
2 => Olives
3 => Pineapple
4 => HamExample #2 Iterating AppendIterator with the AppendIterator API
<?php
$pizzas???=?new?ArrayIterator(array('Margarita',?'Siciliana',?'Hawaii'));
$toppings?=?new?ArrayIterator(array('Cheese',?'Anchovies',?'Olives',?'Pineapple',?'Ham'));
$appendIterator?=?new?AppendIterator;
$appendIterator->append($pizzas);
$appendIterator->append($toppings);
while?($appendIterator->valid())?{
????printf(
????????'%s?=>?%s?=>?%s%s',
????????$appendIterator->getIteratorIndex(),
????????$appendIterator->key(),
????????$appendIterator->current(),
????????PHP_EOL
????);
????$appendIterator->next();
}
?>The above example will output:
0 => 0 => Margarita
0 => 1 => Siciliana
0 => 2 => Hawaii
1 => 0 => Cheese
1 => 1 => Anchovies
1 => 2 => Olives
1 => 3 => Pineapple
1 => 4 => HamNotes
Caution
When using iterator_to_array() to copy the values of the AppendIterator into an array, you have to set the optional use_key argument to FALSE. When use_key is not FALSE any keys reoccuring in inner iterators will get overwritten in the returned array. There is no way to preserve the original keys.
See Also
- AppendIterator::append() - Appends an iterator
← AppendIterator::append
AppendIterator::current →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
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