php根据地理名称获取百度地图中的位置

$address = $_GET['address'] ? $_GET['address'] : '山东省济南市大明湖风景区';
//坐标
$apiurl = "http://api.map.baidu.com/geocoder/v2/?address=" . $address . "&output=json&ak=3075ca513c180f154a83789e3f93c1c4&callback=showLocation";
$file = file_get_contents($apiurl);
$file = str_replace("showLocation&&showLocation", "", $file);
$file = substr($file, 0, -1);
$file = substr($file, 1);
$arrpoint = json_decode($file, true);

$x = $arrpoint['result']['location']['lng'];
$y = $arrpoint['result']['location']['lat'];

地址查询表单

<form action="index.php">
    <input type="text" name="address" value="<?php echo $address; ?>" />
    <input type="submit" value="提交" />
</form>

地址搜索查询结果

<div id="allmap" class="mt10 mapleft" style="width:100%; height:100%;"></div>

<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.4"></script>
<script type="text/javascript">
    var x = '<?php echo $x; ?>';
    var y = '<?php echo $y; ?>';
    var shopInfo = "地理名称:<?php echo $address; ?></span>";
    var map = new BMap.Map("allmap"); // 创建Map实例
    var point = new BMap.Point(x, y);
    map.centerAndZoom(point, 15); //设置中心点 和缩放级别
    //map.addControl(new BMap.NavigationControl()); //添加鱼骨 
    //map.addControl(new BMap.ScaleControl()); // 添加比例尺控件
    map.addControl(new BMap.OverviewMapControl()); //添加缩略地图控件
    map.enableScrollWheelZoom();                  // 启用滚轮放大缩小。
    map.enableKeyboard();                         // 启用键盘操作。
    // map.addControl(new BMap.MapTypeControl({ anchor: BMAP_ANCHOR_TOP_RIGHT }));

    var marker = new BMap.Marker(point);
    var infoWindow = new BMap.InfoWindow(shopInfo);  // 创建信息窗口对象
    map.addOverlay(marker);
    marker.addEventListener("click", function() {
        this.openInfoWindow(infoWindow);
    });
    //map.openI