PHP | AppendIterator key() Function

PHP | AppendIterator rewind() Function

Last Updated : 21 Nov, 2019

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:

php

<?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()); 
 
?>

Output:

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

Program 2:

php

<?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(); 
} 
 
?>

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

PHP | AppendIterator key() Function

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