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PHP | Ds\Deque contains() Function

Last Updated : 30 Jul, 2019
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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 
<?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 
<?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

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