PHP gets the coordinates that iOS or Android pass through the header (header), obtains the specific city and address through the Baidu interface, and deposits it into the session.

First, encapsulate a method for getting header header files in the Function.php method file.

if (!function_exists (' getallheaders ')) {
function Getallheaders () {
$headers = Array ();
foreach ($_server as $name = = $value) {
if (substr ($name, 0, 5) = = ' Http_ ') {
$headers [Str_replace (', '-'), Ucwords (Strtolower (Str_replace (' _ ', ', ' substr ($name, 5))])] = $value;
}
}
return $headers;
}
}

Then, call the method in the corresponding controller to get the data, first check the session there is no location information.

if (!$_session[' mylocation ')
{
Get positional coordinates
$location = Getallheaders ();
$this->get_location ($location); Calling the encapsulated method
}

Finally, a method is encapsulated to request that the Baidu interface return specific location information and coexist in the session.

Public Function get_location ($location)
{
$lat  = $location [' Latitude '];
$LNG = $location [' Longitude '];

if ($lat && $lng)
{
$url = ' Http://api.map.baidu.com/geocoder/v2/?ak=5BFNbSgnVF5g2O72NpvT Dxfm&location= '. $lat. ‘,‘ . $lng. ' &output=json&pois=1 ';
$html = Json_decode (file_get_contents ($url), true);

if ($html)
{
$myLocation = array (
' city '   = $html [' result '] [' ADDRESSC Omponent ' [' City '],
' addr ' =  isset ($html [' Result '] [' addresscomponent '] [' street '])? $html [' Result '] [ ' Addresscomponent ' [' Street ']: $html [' result '] [' formatted_address '],
' LNG '    => $html [' Result '] [' Location '] [' LNG '],
' lat '     = $html [' result '] [location '] [lat '],
);

$_session[' mylocation '] = $myLocation;
}
}
}

PHP obtains the coordinates that iOS or Android pass through the header (header), obtains the specific city and address through the Baidu interface, and deposits it into the session.