PHP | ArrayIterator valid() Function

PHP | ArrayIterator rewind() Function

Last Updated : 20 Nov, 2019

The ArrayIterator::rewind() function is an inbuilt function in PHP which is used to rewind the array back to the start. Syntax:

void ArrayIterator::rewind( void )

Parameters: This function does not accept any parameters. Return Value: This function does not return any value. Below programs illustrate the ArrayIterator::rewind() function in PHP: Program 1:

php

<?php

// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array(
        "a" => 4,
        "b" => 2,
        "g" => 8,
        "d" => 6,
        "e" => 1,
        "f" => 9
    )
);

// Move to last position
$arrItr->seek(5);

// Display the next value
var_dump($arrItr->next());

// Move to start position
$arrItr->rewind();

// Display the current element
echo $arrItr->current();

?>

Output:

NULL
4

Program 2:

php

<?php
   
// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array(
        "b" => "for",
        "a" => "Geeks",
        "e" => "Science",
        "c" => "Geeks",
        "f" => "Portal",
        "d" => "Computer"
    )
);
  
// Check the validity of ArrayIterator
while($arrItr->valid()) {
    $arrItr->next();
}

// Move to start position
$arrItr->rewind();

// Display the current element
echo $arrItr->current();

?>

Output:

for

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

PHP | ArrayIterator valid() Function

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