array_key_exists array_keys array_map array_merge array_pop array_shift array_unshift array_values array_walk basename class_exists compact count date declare defined dirname echo end explode file_exists file_get_contents function_exists get_class implode in_array intval is_array is_bool is_dir is_file is_int is_null is_numeric is_object is_string json_encode max mb_strlen mb_strpos mb_strtolower min preg_match preg_replace print_r realpath reset rtrim sprintf str_repeat str_replace str_starts_with substr time trim uniqid unlink var_dump ->