Which of the following is not a built-in string function in PHP?str_split()str_combine()str_replace()strrev()

Q5.Which PHP function is used to output one or more strings?print_r()echo()print()sprintf()

<?phpfunction add_some_extra(&$string){ $string .= 'and something extra.';}$str = 'This is a string, ';add_some_extra($str);echo $str; // outputs 'This is a string, and something extra.'?>

Which method is used to split a string into an array of substrings based on a delimiter?a)divide()b)parse()c)split()d)separate()

Please choose the correct answer.Leveraging the method of str_replace is absolutely safe.TrueFalse

How do you join strings in PHP?Question 14Select one:a.$m = “aa” + “bb”;b.$m = “aa” join “bb”;c.$m = “aa”.”bb”;d.$m = join(“aa”,”bb”);