PHP | AppendIterator append() Function

Last Updated : 21 Nov, 2019
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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 
<?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 
<?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

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