PHP | ArrayObjects::_construct() Function

The ArrayObjects class allows objects to work as arrays. The ArrayObjects::_construct() is an in built PHP function to construct a new array object.

Syntax:

public ArrayObject::__construct ($input = array(), int $flags = 0, 
string $iterator_class = "ArrayIterator")

Parameters: This function accepts three parameters as shown in the above syntax and are described below:

$input: This parameter is used to accept input as an array or an object.
$flags: Flags are used to control the behaviour of the Arrayobject.
$iterator_class: It is used to specify the class that will be used for the iteration of the ArrayObject Object.

Return Value: This function returns an ArrayObject on successful compilation.

Errors and Exceptions:

If $input is not an array or an object the compiler will show an error.
If $flags set are not having integer values then the compiler will show an error message.

Below programs illustrate the ArrayObjects::_construct() function:

Program 1:

<?php 
$array = array('1' => 'one', 
               '2' => 'two', 
               '3' => 'three'); 
  
$arrayobject = new ArrayObject($array); 
  
var_dump($arrayobject); 
?> 

Output:

object(ArrayObject)#1 (1) {
  ["storage":"ArrayObject":private]=>
  array(3) {
    [1]=>
    string(3) "one"
    [2]=>
    string(3) "two"
    [3]=>
    string(5) "three"
  }
}

Program 2:

<?php 
$array = array('1' => 'Geeks', 
               '2' => 'for', 
               '3' => 'Geeks'); 
  
$arrayobject = new ArrayObject($array); 
  
var_dump($arrayobject); 
?> 

Output:

object(ArrayObject)#1 (1) {
  ["storage":"ArrayObject":private]=>
  array(3) {
    [1]=>
    string(5) "Geeks"
    [2]=>
    string(3) "for"
    [3]=>
    string(5) "Geeks"
  }
}

Reference:
http://php.net/manual/en/arrayobject.construct.php

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