PHP | Ds\Deque contains() Function

The Ds\Deque::contains() function is an inbuilt function in PHP which is used to check the deque contains given values or not.

Syntax:

bool Ds\Deque::contains( $values )

Parameters: This function accepts single or many $values which hold the value to check that value exist in the deque or not.

Return Value: If value exist in the deque then it returns True otherwise returns False.

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

Program 1:

<?php

// Declare new Deque
$deque = new \Ds\Deque(['G', 'e', 'e', 'k', 's', 5, 2, 7]);

// Use contains() function to check elements
// exist in the deque or not
var_dump($deque->contains('G'));

var_dump($deque->contains('k'));

var_dump($deque->contains('p'));

var_dump($deque->contains(7));

var_dump($deque->contains('5'));

?>

Output:

bool(true)
bool(true)
bool(false)
bool(true)
bool(false)

Program 2:

<?php

// Declare new Deque
$deque = new \Ds\Deque(['G', 'e', 'e', 'k', 's', 5, 2, 7]);

// Use contains() function to check elements
// exist in the deque or not
var_dump($deque->contains('G', 'e'));

var_dump($deque->contains('k', 'e', 7));

var_dump($deque->contains('p', '1'));

var_dump($deque->contains(7, 1));

var_dump($deque->contains('5', 5));

?>

Output:

bool(true)
bool(true)
bool(false)
bool(false)
bool(false)

Reference: https://www.php.net/manual/en/ds-deque.contains.php