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ArrayObject append() function in PHP

Last Updated : 11 Jul, 2025
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The append() function of the ArrayObject class in PHP is used to append a given value onto an ArrayObject. The value being appended can be a single value or an array itself. Syntax: 
void append($value)
Parameters: This function accepts a single parameter $value, representing the value to be appended. Return Value: This function does not returns any value. Below programs illustrate the above function: Program 1: php 
<?php
// PHP function to illustrate the
// append() method

$arrObj = new ArrayObject(array('Geeks',
                        'for', 'Geeks'));

$arrObj->append('welcomes you');

var_dump($arrObj);

?>
Output: 
object(ArrayObject)#1 (1) {
  ["storage":"ArrayObject":private]=>
  array(4) {
    [0]=>
    string(5) "Geeks"
    [1]=>
    string(3) "for"
    [2]=>
    string(5) "Geeks"
    [3]=>
    string(12) "welcomes you"
  }
}
Program 2: php 
<?php
// PHP function to illustrate the
// append() method

$arrObj = new ArrayObject(array('Geeks',
                        'for', 'Geeks'));

// Appending an array
$arrObj->append(array('welcomes', 'you'));

var_dump($arrObj);

?>
Output: 
object(ArrayObject)#1 (1) {
  ["storage":"ArrayObject":private]=>
  array(4) {
    [0]=>
    string(5) "Geeks"
    [1]=>
    string(3) "for"
    [2]=>
    string(5) "Geeks"
    [3]=>
    array(2) {
      [0]=>
      string(8) "welcomes"
      [1]=>
      string(3) "you"
    }
  }
}
Reference: https://www.php.net/manual/en/arrayobject.append.php

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