PHP | Ds\Deque reverse() Function
Last Updated :
14 Aug, 2019
The Ds\Deque::reverse() function is an inbuilt function in PHP which is used to reverse the elements in the Deque in-place.
Syntax:
public Ds\Deque::reverse( void ) : void
Parameters: This function does not accept any parameter.
Return Value: This function does not return any value.
Below programs illustrate the Ds\Deque::reverse() function in PHP:
Program 1:
<?php
$deck = new \Ds\Deque([10, 20, 30, 40, 50, 60]);
echo ( "Elements of Deque\n" );
var_dump( $deck );
$deck ->reverse();
echo ( "\nElements of the reversed deque\n" );
var_dump( $deck );
?>
|
Output:
Elements of Deque
object(Ds\Deque)#1 (6) {
[0]=>
int(10)
[1]=>
int(20)
[2]=>
int(30)
[3]=>
int(40)
[4]=>
int(50)
[5]=>
int(60)
}
Elements of the reversed deque
object(Ds\Deque)#1 (6) {
[0]=>
int(60)
[1]=>
int(50)
[2]=>
int(40)
[3]=>
int(30)
[4]=>
int(20)
[5]=>
int(10)
}
Program 2:
<?php
$deck = new \Ds\Deque([ "geeks" , "GFG" , "ABC" ]);
echo ( "Elements of Deque\n" );
print_r( $deck );
$deck ->reverse();
echo ( "\nElements of the reversed deque\n" );
print_r( $deck );
?>
|
Output:
Elements of Deque
Ds\Deque Object
(
[0] => geeks
[1] => GFG
[2] => ABC
)
Elements of the reversed deque
Ds\Deque Object
(
[0] => ABC
[1] => GFG
[2] => geeks
)
Reference: http://php.net/manual/en/ds-deque.reverse.php
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