[PHP] Latitude and Longitude in PHP: A Few Useful Practices

00-retrieving-floating-point-values.php

<?php

$latitude  = $_REQUEST['acme-demo-latitude'];
$longitude = $_REQUEST['acme-demo-longitude'];

01-filtering-floating-point-values.php

<?php

$latitude  = filter_var(
    $_REQUEST['acme-demo-latitude'],
    FILTER_SANITIZE_NUMBER_FLOAT
);

$longitude = filter_var(
    $_REQUEST['acme-demo-longitude'],
    FILTER_SANITIZE_NUMBER_FLOAT
);

02-parse-the-floating-point-values.php

<?php

$latitude  = floatval(
  filter_var(
    $_REQUEST['acme-demo-latitude'],
    FILTER_SANITIZE_NUMBER_FLOAT
  )
);

$longitude = floatval(
  filter_var(
    $_REQUEST['acme-demo-latitude'],
    FILTER_SANITIZE_NUMBER_FLOAT
  )
);

03-validating-values.php

<?php

// Return false...
if ( ! ( is_float( $latitude ) && is_float( $longitude ) ) ) {
  return false;
}

// Or throw an exception...
if ( ! ( is_float( $latitude ) && is_float( $longitude ) ) ) {
  throw new Exception('Latitude and longitude are not valid floating point values.');
}