1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | <?php /* * GeoPo Encode in PHP * @author : Shintaro Inagaki * @param $location (Array) * @return $geopo (String) */ function geopoEncode($lat, $lng) { // 64characters (number + big and small letter + hyphen + underscore) $chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_"; $geopo = ""; $scale = 7; // Change a degree measure to a decimal number $lat = ($lat + 90) / 180 * pow(8, 10); $lng = ($lng + 180) / 360 * pow(8, 10); // Compute a GeoPo code from head and concatenate for ($i = 0; $i < $scale; $i++) { $geopo .= substr($chars, floor($lat / pow(8, 9 - $i) % 8) + floor($lng / pow(8, 9 - $i) % 8) * 8, 1); } return $geopo; } /* * GeoPo Decode in PHP * @author : Shintaro Inagaki * @param $geopo (String) * @return $location (Array) */ function geopoDecode($geopo) { // 64characters (number + big and small letter + hyphen + underscore) $chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_"; // Array for geolocation $location = array(); for ($i = 0; $i < strlen($geopo); $i++) { // What number of character that equal to a GeoPo code (0-63) $order = strpos($chars, substr($geopo, $i, 1)); // Lat/Lng plus geolocation value of scale $location['lat'] = $location['lat'] + floor($order % 8) * pow(8, 9 - $i); $location['lng'] = $location['lng'] + floor($order / 8) * pow(8, 9 - $i); } // Change a decimal number to a degree measure, and plus revised value that shift center of area $location['lat'] = $location['lat'] * 180 / pow(8, 10) + 180 / pow(8, strlen($geopo)) / 2 - 90; $location['lng'] = $location['lng'] * 360 / pow(8, 10) + 360 / pow(8, strlen($geopo)) / 2 - 180; $location['scale'] = strlen($geopo); return $location; } $conn = pg_connect("dbname=bus user=postgres password=snmc"); if (!$conn) { echo "An error occured.\n"; exit; } if ($_REQUEST['newlatlng']) { $latlng = explode(";", $_REQUEST['newlatlng']); $lat = (float)$latlng[0]; $lng = (float)$latlng[1]; $geoPo = geopoEncode($lat, $lng); $nodelat = (int)($lat * 10000000); $nodelon = (int)($lng * 10000000); echo($nodelat . "," . $nodelon . "=$geoPo<br>"); $sql = "UPDATE stops SET geohash='$geoPo', lat='$nodelat', lng='$nodelon', name=null, suburb=null WHERE geohash = '{$_REQUEST['oldgeopo']}'"; $result = pg_query($conn, $sql); if (!$result) { echo("Error in SQL query: " . pg_last_error() . "<br>\n"); } else if (pg_affected_rows($result) == 0) { echo ("Error 0 points moved, please refresh page and try again"); } else { echo $_REQUEST['oldgeopo'] . " replaced with $geoPo <br>"; $updatedroutes = 0; $result_outdatedroutes = pg_query($conn, "Select * FROM between_stops where points LIKE '%" . $_REQUEST['oldgeopo'] . ";%'"); while ($outdatedroute = pg_fetch_assoc($result_outdatedroutes)) { $newpoints = str_replace($_REQUEST['oldgeopo'], $geoPo, $outdatedroute['points']); $sql = "UPDATE between_stops set points='$newpoints' where fromlocation = '".pg_escape_string($outdatedroute['fromlocation']). "' AND tolocation = '".pg_escape_string($outdatedroute['tolocation'])."' "; $result = pg_query($conn, $sql); if (!$result) { echo("Error in SQL query: " . pg_last_error() . "<br>\n"); } echo "updated ".$outdatedroute['fromlocation']."->".$outdatedroute['tolocation']."<br>"; $updatedroutes++; } echo "updated $updatedroutes routes<br>"; } } flush(); ?> |