PHP string functions

#PHP #course #tutorial PHP functions that you should probably know. $username = “Bro Code“; $phone = “123-456-7890“; //$username = strtolower($username); //$username = strtoupper($username); //$username = trim($username); //$username = str_pad($username, 20, “0“); //$phone = str_replace(“-“, ““, $phone); //$username = strrev($username); //$username = str_shuffle($username); //$equals = strcmp($username, “Bro Code“); //$count = strlen($phone); //$index = strpos($phone, “-“); //$firstname = substr($username, 0, 3); //$lastname = substr($username, 4); //$fullname = explode(“ “, $username); //$username = implode(“-“, $username); echo $username;