Javascript Openlayers v3.13.1，从PHP/Mysql构建层

我在用Openlayers制作的地图项目中。我对JS、AJAX和Openlayers都非常熟悉

我需要在地图中构建层，我有Mysql数据库中的数据，需要执行以下操作：

 var *layername* = new ol.layer.Vector({ // *layername* need to have layername came from php file
              visible: false,
              title: 'puntos', // Here I need to parse a result from mysql data that has the layers names that I need
              source: new ol.source.GeoJSON({
                      url: 'file.php?layer='+, // plus layername
                      projection: 'EPSG:3857',
              }),
              style: new ol.style.Style({
                    image: new ol.style.Icon(({
                          anchor: [10, 26],
                          anchorXUnits: 'pixels',
                          anchorYUnits: 'pixels',
                          src: "./img/marquita_naranja.png" // this has to came from php too
                    })),
              })
new ol.layer.Group({
                    title: 'Capas',
                    layers: lcapas, // I need to build this from an Array with Mysql reasult
          }),

new ol.layer.Group({
                    title: 'Capas',
                    layers: [
                               new ol.layer.Vector({
              visible: false,
              title: 'Ciudades y Plazas',
              source: new ol.source.GeoJSON({
                      url: 'consulta_puntos.php?capa=Ciudades y Plazas',
                      projection: 'EPSG:3857',
              }),
              style: new ol.style.Style({
                    image: new ol.style.Icon(({
                          anchor: [10, 26],
                          anchorXUnits: 'pixels',
                          anchorYUnits: 'pixels',
                          src: "./img/marquita_verde.png"
                    })),
              }),
          }),
          new ol.layer.Vector({
              visible: false,
              title: 'Museos',
              source: new ol.source.GeoJSON({
                      url: 'consulta_puntos.php?capa=Museos',
                      projection: 'EPSG:3857',
              }),
              style: new ol.style.Style({
                    image: new ol.style.Icon(({
                          anchor: [10, 26],
                          anchorXUnits: 'pixels',
                          anchorYUnits: 'pixels',
                          src: "./img/marquita_amarilla.png"
                    })),
              }),
          }),
          new ol.layer.Vector({
              visible: false,
              title: 'Lagos',
              source: new ol.source.GeoJSON({
                      url: 'consulta_puntos.php?capa=Lagos',
                      projection: 'EPSG:3857',
              }),
              style: new ol.style.Style({
                    image: new ol.style.Icon(({
                          anchor: [10, 26],
                          anchorXUnits: 'pixels',
                          anchorYUnits: 'pixels',
                          src: "./img/marquita_azul.png"
                    })),
              }),
          }),
       ]

注意：我现在有五层要解析，可能是一个循环。。。我的意思是五个结果的动态构建，需要构建如下内容：

 var *layername* = new ol.layer.Vector({ // *layername* need to have layername came from php file
              visible: false,
              title: 'puntos', // Here I need to parse a result from mysql data that has the layers names that I need
              source: new ol.source.GeoJSON({
                      url: 'file.php?layer='+, // plus layername
                      projection: 'EPSG:3857',
              }),
              style: new ol.style.Style({
                    image: new ol.style.Icon(({
                          anchor: [10, 26],
                          anchorXUnits: 'pixels',
                          anchorYUnits: 'pixels',
                          src: "./img/marquita_naranja.png" // this has to came from php too
                    })),
              })
new ol.layer.Group({
                    title: 'Capas',
                    layers: lcapas, // I need to build this from an Array with Mysql reasult
          }),

new ol.layer.Group({
                    title: 'Capas',
                    layers: [
                               new ol.layer.Vector({
              visible: false,
              title: 'Ciudades y Plazas',
              source: new ol.source.GeoJSON({
                      url: 'consulta_puntos.php?capa=Ciudades y Plazas',
                      projection: 'EPSG:3857',
              }),
              style: new ol.style.Style({
                    image: new ol.style.Icon(({
                          anchor: [10, 26],
                          anchorXUnits: 'pixels',
                          anchorYUnits: 'pixels',
                          src: "./img/marquita_verde.png"
                    })),
              }),
          }),
          new ol.layer.Vector({
              visible: false,
              title: 'Museos',
              source: new ol.source.GeoJSON({
                      url: 'consulta_puntos.php?capa=Museos',
                      projection: 'EPSG:3857',
              }),
              style: new ol.style.Style({
                    image: new ol.style.Icon(({
                          anchor: [10, 26],
                          anchorXUnits: 'pixels',
                          anchorYUnits: 'pixels',
                          src: "./img/marquita_amarilla.png"
                    })),
              }),
          }),
          new ol.layer.Vector({
              visible: false,
              title: 'Lagos',
              source: new ol.source.GeoJSON({
                      url: 'consulta_puntos.php?capa=Lagos',
                      projection: 'EPSG:3857',
              }),
              style: new ol.style.Style({
                    image: new ol.style.Icon(({
                          anchor: [10, 26],
                          anchorXUnits: 'pixels',
                          anchorYUnits: 'pixels',
                          src: "./img/marquita_azul.png"
                    })),
              }),
          }),
       ]

烧掉我的眼睛在谷歌中搜索一些对我有帮助的东西，但是我发现所有的东西都使用AJAX，结果都写在HTML对象中，我不需要这个

对不起，如果这是一个很难回答的问题，非常抱歉我的英语这不是我的主要语言

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PD:提前谢谢，希望有人能帮上忙。。。。好吧，也许这是不可能的。。。并且需要手动添加层。。。。其想法是：用户可以创建层，OpenLayer3可以从数据库中提供这些层。。。。但我仍然在到处搜索，什么也没找到，，，，，有可能做这样的事情吗？.我现在正在尝试做这样的事情：层['layer_'+layername]=new ol.layer.Vector（{……source:new ol.source.GeoJSON（{……php Json result…}）；。。。。。。对象形式确定。。。但是我不知道怎么把这个添加到地图上。。ajax给了我layername