PHP | Ds\Deque join() Function

The Ds\Deque::join() function is an inbuilt function in PHP which is used to join all values in the Deque as a string. The separator can also be used to join the elements.

Syntax:

public Ds\Deque::join( $glue ) : string

Parameters: This function accepts single parameter $glue which holds the separator to separate Deque elements.

Return Value: This function returns all values of the Deque joined as a string.

Below programs illustrate the Ds\Deque::join() function in PHP:

Program 1:

<?php

// Declare a deque
$deck = new \Ds\Deque([1, 2, 3, 4, 5, 6]);

echo("Original Deque\n");

// Display the Deque elements
print_r($deck);

echo("\nString form: ");

// Use join() function to joining
// the values in Deque
var_dump($deck->join("|"));

?>

Output:

Original Deque
Ds\Deque Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)

String form: string(11) "1|2|3|4|5|6"

Program 2:

<?php

// Declare a deque
$deck = new \Ds\Deque(["Geeks", "for", "Geeks"]);

echo("Original Deque\n");

// Display the Deque elements
print_r($deck);

echo("\nString form: ");

// Use join() function to joining
// the values in Deque
var_dump($deck->join());

?>

Output:

Original Deque
Ds\Deque Object
(
    [0] => Geeks
    [1] => for
    [2] => Geeks
)

String form: string(13) "GeeksforGeeks"

Reference: http://php.net/manual/en/ds-deque.join.php