"Java", "2" => "C/C++", "3" => "Android", "4" => "iOS", "5" => "Web", "6" => "UE", "7" => "UI" ); if(!isset($course_type_arr[$course_type])) { //课程类型不存在 echo ''; }else{ $single_course_arr = getPhaseDaysByTyptId($course_type); } } if(isset($_GET["section"]) && !empty($_GET["section"])){ //参数存在 $section_url = $_GET["section"]; } if(isset($_GET["lesson"]) && !empty($_GET["lesson"])){ //参数存在 $lesson_url = $_GET["lesson"]; } ?>