PHP | Ds\Deque clear() Function Last Updated : 11 Jul, 2025 Summarize Comments Improve Suggest changes Share Like Article Like Report The Ds\Deque::clear() function is an inbuilt function in PHP which is used to clear the Deque by removing all elements from the Deque. Syntax: public Ds\Deque::clear( void ) : void Parameters: This function does not accepts any parameter. Return Value: This function does not return any Value. Below programs illustrate the Ds\Deque::clear() function in PHP: Program 1: PHP <?php // Declare deque of default size $deck = new \Ds\Deque([1, 2, 3, 4, 5, 6]); echo("Elements in the deck:\n"); // Display the Deque elements print_r($deck); // Use clear() function to clear the deque $deck->clear(); // Display the deque print_r($deck); ?> Output: Elements in the deck: Ds\Deque Object ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 ) Ds\Deque Object ( ) Program 2: PHP <?php // Declare deque of default size $deck = new \Ds\Deque(["geeks", "for", "geeks"]); echo("Elements in the Deque\n"); // Display the Deque elements print_r($deck); // Use clear() function to clear the deque $deck->clear(); echo("Alter clearing the elements\n"); // Display the deque print_r($deck); ?> Output: Elements in the Deque Ds\Deque Object ( [0] => geeks [1] => for [2] => geeks ) Alter clearing the elements Ds\Deque Object ( ) Reference: https://www.php.net/manual/en/ds-deque.clear.php Comment More infoAdvertise with us Next Article PHP | Ds\Deque copy() Function B barykrg Follow Improve Article Tags : Web Technologies PHP PHP-function PHP-ds_map Similar Reads PHP | Ds\Deque copy() Function The Ds\Deque::copy() function is an inbuilt function in PHP which is used to return a copy of the Deque. This will return a shallow copy of the Deque. Syntax: public Ds\Deque::copy ( void ) : Ds\Deque Parameters: This function does not contain any parameter. Return Value: This function returns a cop 2 min read PHP | Ds\Deque copy() Function The Ds\Deque::copy() function is an inbuilt function in PHP which is used to return a copy of the Deque. This will return a shallow copy of the Deque. Syntax: public Ds\Deque::copy ( void ) : Ds\Deque Parameters: This function does not contain any parameter. Return Value: This function returns a cop 2 min read PHP | Ds\Deque apply() Function The Ds\Deque::apply() function is an inbuilt function in PHP which is used to update the values of Deque by performing operations as defined by the callback function. Syntax: public Ds\Deque::apply( $callback ) : void Parameters: This function accepts single parameter $callback which holds the funct 2 min read PHP | Ds\Deque apply() Function The Ds\Deque::apply() function is an inbuilt function in PHP which is used to update the values of Deque by performing operations as defined by the callback function. Syntax: public Ds\Deque::apply( $callback ) : void Parameters: This function accepts single parameter $callback which holds the funct 2 min read PHP | Ds\Deque count() Function The Ds\Deque::count() function is an inbuilt function in PHP which is used to get the number of elements in the Deque. Syntax: public Ds\Deque::count( void ) : int Parameters: This function does not accept any parameter. Return Value: This function returns the number of elements in the Deque. Below 1 min read PHP | Ds\Deque count() Function The Ds\Deque::count() function is an inbuilt function in PHP which is used to get the number of elements in the Deque. Syntax: public Ds\Deque::count( void ) : int Parameters: This function does not accept any parameter. Return Value: This function returns the number of elements in the Deque. Below 1 min read Like