PHP Velho Oeste 2024

RecursiveFilterIterator::__construct

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

RecursiveFilterIterator::__constructCreate a RecursiveFilterIterator from a RecursiveIterator

Beschreibung

public RecursiveFilterIterator::__construct(RecursiveIterator $iterator)

Create a RecursiveFilterIterator from a RecursiveIterator.

Parameter-Liste

iterator

The RecursiveIterator to be filtered.

Beispiele

Beispiel #1 Basic RecursiveFilterIterator() example

<?php
class TestsOnlyFilter extends RecursiveFilterIterator {
public function
accept() {
// Accept the current item if we can recurse into it
// or it is a value starting with "test"
return $this->hasChildren() || (strpos($this->current(), "test") !== FALSE);
}
}

$array = array("test1", array("taste2", "test3", "test4"), "test5");
$iterator = new RecursiveArrayIterator($array);
$filter = new TestsOnlyFilter($iterator);

foreach(new
RecursiveIteratorIterator($filter) as $key => $value)
{
echo
$value . "\n";
}
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

test1
test3
test4
test5

Beispiel #2 RecursiveFilterIterator() example

<?php
class StartsWithFilter extends RecursiveFilterIterator {

protected
$word;

public function
__construct(RecursiveIterator $rit, $word) {
$this->word = $word;
parent::__construct($rit);
}

public function
accept() {
return
$this->hasChildren() OR strpos($this->current(), $this->word) === 0;
}

public function
getChildren() {
return new
self($this->getInnerIterator()->getChildren(), $this->word);
}
}

$array = array("test1", array("taste2", "test3", "test4"), "test5");
$iterator = new RecursiveArrayIterator($array);
$filter = new StartsWithFilter($iterator, "test");

foreach(new
RecursiveIteratorIterator($filter) as $key => $value)
{
echo
$value . "\n";
}
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

test1
test3
test4
test5

Siehe auch

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