js给php传值

    //ajax传值
                                var str= JSON.stringify(arr1);//数组转string
                                //alert(typeof(str));
                                $.ajax({
                                  url:'test.php'
                                  ,type:'POST'
                                  ,data:{str:str}
                                  ,success:function(rst){alert('接受成功！');}
                                  ,error:function(xhr){alert('php页面有错误！'+xhr.responseText);}
                              });