PHP | AppendIterator rewind() Function

The AppendIterator::rewind() function is an inbuilt function in PHP which is used to rewind to the first element of the first inner Iterator.

Syntax:

void AppendIterator::rewind( void )

Parameters: This function does not accept any parameters.

Return Value: This function does not return any value.

Below programs illustrate the AppendIterator::rewind() function in PHP:



Program 1:

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<?php
   
// Declare an ArrayIterator
$arr1 = new ArrayIterator(array("Geeks", "for", "Geeks"));
   
// Create a new AppendIterator
$itr = new AppendIterator;
$itr->append($arr1);
  
// Using rewind function 
$itr->rewind(); 
    
// Get current data  
var_dump($itr->current()); 
    
// Move on to next object 
$itr->next(); 
    
// Get current data  
var_dump($itr->current()); 
    
// Again using rewind function 
$itr->rewind(); 
    
// Get current data  
var_dump($itr->current()); 
   
?>

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Output:

string(5) "Geeks"
string(3) "for"
string(5) "Geeks"

Program 2:

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<?php
   
// Declare an ArrayIterator
$arr1 = new ArrayIterator(array("Geeks", "for", "Geeks"));
$arr2 = new ArrayIterator(array("Computer", "Science", "Portal"));
  
// Create a new AppendIterator
$itr = new AppendIterator;
$itr->append($arr1);
$itr->append($arr2);
  
// Using rewind function 
$itr->rewind(); 
    
while($itr->valid()) { 
    var_dump($itr->current()); 
        
    // Moving to next element 
    $itr->next(); 
   
?>

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Output:

string(5) "Geeks"
string(3) "for"
string(5) "Geeks"
string(8) "Computer"
string(7) "Science"
string(6) "Portal"

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




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