PHP | AppendIterator append() Function

The AppendIterator::append() function is an inbuilt function in PHP which is used to append an iterator.

Syntax:

void AppendIterator::append( Iterator $iterator )

Parameters: This function accepts single parameter $iterator which holds the iterator to append.

Return Value: This function does not return any value.

Below programs illustrate the AppendIterator::append() function in PHP:

Program 1:

<?php

// Declare an ArrayIterator
$arr1 = new ArrayIterator(array('G', 'e', 'e', 'k', 's'));
$arr2 = new ArrayIterator(array('f', 'o', 'r'));
$arr3 = new ArrayIterator(array('G', 'e', 'e', 'k', 's'));

// Create a new AppendIterator
$itr = new AppendIterator;
$itr->append($arr1);
$itr->append($arr2);
$itr->append($arr3);

// Display the result
foreach ($itr as $val) {
    echo $val;
}

?>

Output:

GeeksforGeeks

Program 2:

<?php

// Declare an ArrayIterator
$arr1 = new ArrayIterator(array("Geeks", "for", "Geeks"));
$arr2 = new ArrayIterator(array("Computer", "Science", "Portal"));

// Create a new AppendIterator
$itr = new AppendIterator;
$itr->append($arr1);
$itr->append($arr2);

// Display the result
foreach ($itr as $val) {
    echo $val;
}

?>

Output:

GeeksforGeeksComputerSciencePortal

Reference: https://www.php.net/manual/en/appenditerator.append.php