How to reset Array in PHP ? Last Updated : 21 Jun, 2021 Summarize Comments Improve Suggest changes Share Like Article Like Report You can reset array values or clear the values very easily in PHP. There are two methods to reset the array which are discussed further in this article. Methods: unset() Functionarray_diff() Function Method 1: unset() function: The unset() function is used to unset a specified variable or entire array. Syntax: unset( $variable ) Parameters: $variable: This parameter is required, it is the variable that is needed to be unset. Return Value: This function does not return any value. PHP <?php $arr1 = array( 'geeks', 'for', 'geeks' ); // Print the array before reset print_r ($arr1); // Remove item from array unset($arr1); // Print the reset array var_dump($arr1); ?> Output: array(3) { [0]=> string(5) "geeks" [1]=> string(3) "for" [2]=> string(5) "geeks" } PHP Notice: Undefined variable: arr1 in /home/159dfdccfb89fccb996feb49cfc37d39.php on line 18 NULL Method 2: array_diff() function: The array_diff() function accepts two or more arguments and returns an array containing values from the first array which are not present in other arrays. Syntax: array_diff($array1, $array2, ..., $arrayn) Parameters: The function can take any number of arrays as parameters needed to be compared. Return Value: This function compares the first array in parameters with the rest of the arrays and returns an array containing all the entries from $array1 that are not present in any of the other arrays. PHP <?php $array = array("Ankesh","Saurabh","Ashish","Ashu", "Anuj", "Ajinkya"); //Array before reset print_r ($array); // Clear the whole values of array $array = array_diff( $array, $array); // Array after reset print_r ($array); ?> OutputArray ( [0] => Ankesh [1] => Saurabh [2] => Ashish [3] => Ashu [4] => Anuj [5] => Ajinkya ) Array ( ) Comment More infoAdvertise with us Next Article How to reset Array in PHP ? A aksrathod07 Follow Improve Article Tags : Web Technologies PHP PHP-function PHP-Questions Similar Reads Non-linear Components In electrical circuits, Non-linear Components are electronic devices that need an external power source to operate actively. Non-Linear Components are those that are changed with respect to the voltage and current. Elements that do not follow ohm's law are called Non-linear Components. Non-linear Co 11 min read JavaScript Tutorial JavaScript is a programming language used to create dynamic content for websites. 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