私はphpを使用して、MCC、MNC、LAC、およびセルIDから緯度と経度を取得しています。コンピューターのWampserverでコードを実行すると、正しい緯度と経度が取得され、Googleマップにプロットされます。しかし、Webサーバーにデプロイすると、別の値が得られます。
MCCに入るときの正しい緯度と経度：505; MNC：1; LAC：30817; セルID：2922は（-31.844589,115.80378）です。しかし、代わりにサーバーで（4263.122707,115.803781）を取得しています。
これが私が使用しているコードです：
<?php
if (isset($_POST["lac"]) && isset($_POST["cid"]) && isset($_POST["mnc"]) && isset($_POST["mcc"])) {
$lac = $_POST["lac"];
$cid = $_POST["cid"];
$mcc = $_POST["mcc"];
$mnc = $_POST["mnc"];
$data =
"\x00\x0e".
"\x00\x00\x00\x00\x00\x00\x00\x00".
"\x00\x00".
"\x00\x00".
"\x00\x00".
"\x1b".
"\x00\x00\x00\x00".
"\x00\x00\x00\x00".
"\x00\x00\x00\x00".
"\x00\x00".
"\x00\x00\x00\x00".
"\x00\x00\x00\x00".
"\x00\x00\x00\x00".
"\x00\x00\x00\x00".
"\xff\xff\xff\xff".
"\x00\x00\x00\x00";
$is_umts_cell = ($cid > 65535);
if ($is_umts_cell) // GSM: 4 hex digits, UTMS: 6 hex digits
$data[0x1c] = 5;
else
$data[0x1c] = 3;
$hexmcc = substr("00000000".dechex($_POST["mcc"]),-8);
$hexmnc = substr("00000000".dechex($_POST["mnc"]),-8);
$hexlac = substr("00000000".dechex($_POST["lac"]),-8);
$hexcid = substr("00000000".dechex($_POST["cid"]),-8);
//echo "<p>MCC=$hexmcc MNC=$hexmnc LAC=$hexlac CID=$hexcid";
$data[0x11] = pack("H*",substr($hexmnc,0,2));
$data[0x12] = pack("H*",substr($hexmnc,2,2));
$data[0x13] = pack("H*",substr($hexmnc,4,2));
$data[0x14] = pack("H*",substr($hexmnc,6,2));
$data[0x15] = pack("H*",substr($hexmcc,0,2));
$data[0x16] = pack("H*",substr($hexmcc,2,2));
$data[0x17] = pack("H*",substr($hexmcc,4,2));
$data[0x18] = pack("H*",substr($hexmcc,6,2));
$data[0x27] = pack("H*",substr($hexmnc,0,2));
$data[0x28] = pack("H*",substr($hexmnc,2,2));
$data[0x29] = pack("H*",substr($hexmnc,4,2));
$data[0x2a] = pack("H*",substr($hexmnc,6,2));
$data[0x2b] = pack("H*",substr($hexmcc,0,2));
$data[0x2c] = pack("H*",substr($hexmcc,2,2));
$data[0x2d] = pack("H*",substr($hexmcc,4,2));
$data[0x2e] = pack("H*",substr($hexmcc,6,2));
$data[0x1f] = pack("H*",substr($hexcid,0,2));
$data[0x20] = pack("H*",substr($hexcid,2,2));
$data[0x21] = pack("H*",substr($hexcid,4,2));
$data[0x22] = pack("H*",substr($hexcid,6,2));
$data[0x23] = pack("H*",substr($hexlac,0,2));
$data[0x24] = pack("H*",substr($hexlac,2,2));
$data[0x25] = pack("H*",substr($hexlac,4,2));
$data[0x26] = pack("H*",substr($hexlac,6,2));
/* I used file_get_contents() at my laptop webserver, but it seems like the PHP version
* at my hosting company is old and it is not supporting that.
* For the hosting company, here we're using cURL.
*/
$use_curl = true;
if ($use_curl) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://www.google.com/glm/mmap");
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, Array("Content-type: application/binary"));
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_POST, 1);
$response = curl_exec($ch);
if (curl_errno($ch))
exit("Error: Failed to post data $str curl_errno($ch)");
$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$str = substr($response, $header_size);
curl_close($ch);
} else {
$context = array (
'http' => array (
'method' => 'POST',
'header'=> "Content-type: application/binary\r\n"
. "Content-Length: " . strlen($data) . "\r\n",
'content' => $data
)
);
$xcontext = stream_context_create($context);
$str=file_get_contents("http://www.google.com/glm/mmap", FALSE, $xcontext);
}
$opcode1 = ((ord($str[0]) << 8)) | ord($str[1]);
$opcode2 = ord($str[2]);
if (($opcode1 != 0x0e) || ($opcode2 != 0x1b))
exit("<p>Error: Invalid opcode $opcode1 $opcode2. Maybe the LAC/CID is invalid");
$retcode = ((ord($str[3]) << 24) | (ord($str[4]) << 16) | (ord($str[5]) << 8) | (ord($str[6])));
if ($retcode != 0)
exit("<p>Error: Invalid return code $retcode. Maybe the LAC/CID is invalid");
$lon = ((ord($str[11]) << 24) | (ord($str[12]) << 16) | (ord($str[13]) << 8) | (ord($str[14]))) / 1000000;
$lat = ((ord($str[7]) << 24) | (ord($str[8]) << 16) | (ord($str[9]) << 8) | (ord($str[10]))) / 1000000;
// exit script if cannot geocode cell e.g. not on google's database
if ($lat == 0 and $lon == 0)
exit('ERROR: cannot determine cell tower location from cell LAC: ' . $_POST["lac"] . ', ' . 'CID: ' . $_POST["cid"]);
$addr = ''.$lat . ',' . $lon;
$t = urlencode(" (MCC=$mcc MNC=$mnc LAC=$lac CID=$cid)");
//echo "<p><a href='http://maps.google.com/maps?q=$addr$t' target='_top'>Lat=$lat Lon=$lon</a>";
}
?>
<form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>">
<div >MCC
<input type="text" size="5" name="mcc" value="<?php if(isset($mcc)) echo $mcc; else echo ""?>">
MNC
<input type="text" size="5" name="mnc" value="<?php if(isset($mnc)) echo $mnc; else echo ""?>">
LAC
<input type="text" size="5" name="lac" value="<?php if(isset($lac)) echo $lac; else echo ""?>">
CID
<input type="text" size="5" name="cid" value="<?php if(isset($cid)) echo $cid; else echo ""?>">
<input type="Submit" value="Check it"></div>
</form>
<p>
<iframe
width="600" height="400" frameborder="0" scrolling="no" marginheight="0" marginwidth="0"
src="http://maps.google.com/maps?q=<?php if(isset($addr)) echo $addr; else echo ''?>&ie=UTF8&ll=<?php if(isset($addr)) echo $addr; else echo ''?>&sll=<?php if(isset($addr)) echo $addr; else echo ''?>&z=11&output=embed"></iframe>
</p>