PHP ArrayIterator __construct() Function

The ArrayIterator::__construct() function is an inbuilt function in PHP which is used to construct an ArrayIterator. 

Syntax:

public ArrayIterator::__construct( mixed $array, int $flags = 0 )

Parameters: This function accepts two parameters as mentioned above and described below:

• $array: This parameter holds the array or array of object iterator.
• $flag: This parameter holds the flat to control the behavior of the ArrayIterator object.

Return Value: This function returns the ArrayIterator object. 

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

Program 1:

php

<?php

// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array('G', 'e', 'e', 'k', 's', 'f', 'o', 'r'),
    ArrayIterator::ARRAY_AS_PROPS
);

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

?>

Output:

Geeksfor

Program 2:

php

<?php

// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array("Geeks", "for", "Geeks"),
    ArrayIterator::STD_PROP_LIST
);

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

?>

Output:

0 => Geeks
1 => for
2 => Geeks

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