PHP | ArrayIterator rewind() Function

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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 
  
// 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 
     
// 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(); 
  
?> 