什么是Php Ajax响应：->请参阅我的代码if（response == 1）if（response == 1）是什么意思

Question

$.ajax({
            url: 'addremove.php',
           type: 'post',
            data: {path: imgElement_src,request: 2},
              success: function(response){


           if(response == 1){
             $('#content_'+num).remove();
           }


          }
        });