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
