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PHP Ds\Set reversed() Function

  • Last Updated : 16 Aug, 2019

The Ds\Set::reversed() function of Ds\Set class in PHP is an inbuilt function which is used to create a copy of the original Set with values arranged in reverse order. That is, this function returns a reversed copy of the actual set. This function does not affect the original set instance.

Syntax:

Ds\Set public Ds\Set::reversed ( void )

Parameter: This function does not accepts any parameter.

Return Value: This function returns a reversed copy of the actual Set instance.

Below programs illustrate the Ds\Set::reversed() function:



Program 1:




<?php 
  
// Declare an empty set 
$set = new \Ds\Set([1, 2, 3, 4, 5]);
  
// Print the reversed copy
echo("Reversed Set is: \n"); 
print_r($set->reversed()); 
  
// Actual Set remains unchanged
echo "\n\nActual Set is:\n";
print_r($set);
  
?> 
Output:
Reversed Set is: 
Ds\Set Object
(
    [0] => 5
    [1] => 4
    [2] => 3
    [3] => 2
    [4] => 1
)


Actual Set is:
Ds\Set Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
)

Program 2:




<?php 
  
// Declare an empty set 
$set = new \Ds\Set(["Welcome", "2", "Geeks"]);
  
// Print the reversed copy
echo("Reversed Set is: \n"); 
print_r($set->reversed()); 
  
// Actual Set remains unchanged
echo "\n\nActual Set is:\n";
print_r($set);
  
?> 
Output:
Reversed Set is: 
Ds\Set Object
(
    [0] => Geeks
    [1] => 2
    [2] => Welcome
)


Actual Set is:
Ds\Set Object
(
    [0] => Welcome
    [1] => 2
    [2] => Geeks
)

Reference: http://php.net/manual/en/ds-set.reversed.php




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