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890天前 $uid=$_POST[uid]; |
if($uid>0) |
{ |
$re=mysql_query("select `lat`,`long` from pre_common_member where uid='$uid'")or die(mysql_error()); |
$row=mysql_fetch_assoc($re); |
if(!empty($row[lat]) and !empty($row[long])) |
{ |
$re0=mysql_query("select `username`,`lat`,`long` from pre_common_member where uid!='$uid'"); |
while($row0=mysql_fetch_assoc($re0)) |
{ |
$distance = getDistanceBetweenPointsNew($row['lat'], $row['long'], $row0['lat'], $row0['long']); |
$row0[meter]=$distance[meters]; |
$arr[]=$row0; |
} |
$arr=array_sort($arr,'meter'); |
$arr = array_slice($arr,0,10); |
$data=json_encode($arr); |
$s=mysql_errno(); |
//echo $data; |
echo "{\"s\":$s,\"data\":$data}"; |
} |
} |
// 比较两个地点的距离 |
function getDistanceBetweenPointsNew($latitude1, $longitude1, $latitude2, $longitude2) |
{ |
$theta = $longitude1 - $longitude2; |
$miles = (sin(deg2rad($latitude1)) * sin(deg2rad($latitude2))) + (cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta))); |
$miles = acos($miles); |
$miles = rad2deg($miles); |
$miles = $miles * 60 * 1.1515; |
$feet = $miles * 5280; |
$yards = $feet / 3; |
$kilometers = $miles * 1.609344; |
$meters = $kilometers * 1000; |
return compact('miles', 'feet', 'yards', 'kilometers', 'meters'); |
} |
// 二维数组按某个key排序 |
function array_sort($arr,$keys,$type='asc') |
{ |
$keysvalue = $new_array = array(); |
foreach ($arr as $k=>$v){ |
$keysvalue[$k] = $v[$keys]; |
} |
if($type == 'asc'){ |
asort($keysvalue); |
}else{ |
arsort($keysvalue); |
} |
reset($keysvalue); |
foreach ($keysvalue as $k=>$v){ |
$new_array[$k] = $arr[$k]; |
} |
return $new_array; |
} |
