PHP DsSet reverse() Function

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

<?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

<?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

PHP DsSet reverse() Function

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