PHP | ArrayIterator append() Function

The ArrayIterator::append() function is an inbuilt function in PHP which is used to append an element into an array iterator.

Syntax:

void ArrayIterator::append( mixed $value )

Parameters: This function accepts single parameter $value that holds the value that need to be append.

Return Value: This function does not return any value.

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

Program 1:

<?php

// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array('G', 'e', 'e', 'k', 's')
);

// Append the element into array iterator
$arrItr->append("123");

// Display the elements
while($arrItr->valid()) {
    echo $arrItr->current();
    $arrItr->next();
}

?>

Output:

Geeks123

Program 2:

<?php

// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array(
        "a" => "Geeks",
        "b" => "for",
        "c" => "Geeks"
    )
);

// Append the array element
$arrItr->append("Computer");
$arrItr->append("Science");
$arrItr->append("Portal");

// Display the elements
foreach ($arrItr as $key => $val) {
    echo $key . " => " . $val . "\n";
}

?>

Output:

a => Geeks
b => for
c => Geeks
0 => Computer
1 => Science
2 => Portal

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