RecursiveIteratorIterator::__construct
(PHP 5 >= 5.1.3, PHP 7, PHP 8)
RecursiveIteratorIterator::__construct — Construct a RecursiveIteratorIterator
Description
$iterator, int $mode = RecursiveIteratorIterator::LEAVES_ONLY, int $flags = 0)Creates a RecursiveIteratorIterator from a RecursiveIterator.
Parameters
-
iterator -
The iterator being constructed from. Either a RecursiveIterator or IteratorAggregate.
-
mode -
Optional mode. Possible values are
-
RecursiveIteratorIterator::LEAVES_ONLY- The default. Lists only leaves in iteration. -
RecursiveIteratorIterator::SELF_FIRST- Lists leaves and parents in iteration with parents coming first. -
RecursiveIteratorIterator::CHILD_FIRST- Lists leaves and parents in iteration with leaves coming first.
-
-
flags -
Optional flag. Possible values are
RecursiveIteratorIterator::CATCH_GET_CHILDwhich will then ignore exceptions thrown in calls to RecursiveIteratorIterator::getChildren().
Examples
Example #1 Iterating a RecursiveIteratorIterator
<?php
$array = array(
array(
array(
array(
'leaf-0-0-0-0',
'leaf-0-0-0-1'
),
'leaf-0-0-0'
),
array(
array(
'leaf-0-1-0-0',
'leaf-0-1-0-1'
),
'leaf-0-1-0'
),
'leaf-0-0'
)
);
$iterator = new RecursiveIteratorIterator(
new RecursiveArrayIterator($array),
$mode
);
foreach ($iterator as $key => $leaf) {
echo "$key => $leaf", PHP_EOL;
}
?>
Output with $mode = RecursiveIteratorIterator::LEAVES_ONLY
0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 0 => leaf-0-0-0 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 0 => leaf-0-1-0 0 => leaf-0-0
Output with $mode = RecursiveIteratorIterator::SELF_FIRST
0 => Array 0 => Array 0 => Array 0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 1 => leaf-0-0-0 1 => Array 0 => Array 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 1 => leaf-0-1-0 2 => leaf-0-0
Output with $mode = RecursiveIteratorIterator::CHILD_FIRST
0 => leaf-0-0-0-0 1 => leaf-0-0-0-1 0 => Array 1 => leaf-0-0-0 0 => Array 0 => leaf-0-1-0-0 1 => leaf-0-1-0-1 0 => Array 1 => leaf-0-1-0 1 => Array 2 => leaf-0-0 0 => Array
