Simple geo targeted search with Sphinx

gistfile1.php

<?php

require_once('sphinxapi.php');

$sphinx = new sphinxClient;
$sphinx->SetServer('localhost',9312);

// How many k's from the target do we want to return results from?
// 10k's should do it. (In metres)
// @geodist is a magic key displaying metres from target.
$sphinx->SetFilterFloatRange('@geodist',0,10000);

// We'll base our search in Sydney CBD...
// $ search -i suburbs 'sydney' gives this...
// 3. document=188, weight=1, postcode=2000, lat=-0.591084, lon=2.639081
$sphinx->SetGeoAnchor('lat', 'lon', -0.591084, 2.639081);

// Sort by the distance from our target
$sphinx->SetSortMode(SPH_SORT_EXTENDED, "@geodist ASC");

// Run the query
$results = $sphinx->Query('', 'suburbs');

// Check the results.
dump($results['matches']);

function dump($s) {
  print '<pre>';
  print_r($s);
  print '</pre>';
}
?>