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Forked from henare/find_state.php
Created October 19, 2015 02:31
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Function to determine Australian state from a postcode, from http://waww.com.au/ramblings/determine-state-from-postcode-in-australia
/**
* Returns the state for a postcode.
* eg. NSW
*
* @author http://waww.com.au/ramblings/determine-state-from-postcode-in-australia
* @link http://en.wikipedia.org/wiki/Postcodes_in_Australia#States_and_territories
*/
function findState($postcode) {
$ranges = array(
'NSW' => array(
1000, 1999,
2000, 2599,
2619, 2898,
2921, 2999
),
'ACT' => array(
200, 299,
2600, 2618,
2900, 2920
),
'VIC' => array(
3000, 3999,
8000, 8999
),
'QLD' => array(
4000, 4999,
9000, 9999
),
'SA' => array(
5000, 5999
),
'WA' => array(
6000, 6797,
6800, 6999
),
'TAS' => array(
7000, 7999
),
'NT' => array(
800, 999
)
);
$exceptions = array(
872 => 'NT',
2540 => 'NSW',
2611 => 'ACT',
2620 => 'NSW',
3500 => 'VIC',
3585 => 'VIC',
3586 => 'VIC',
3644 => 'VIC',
3707 => 'VIC',
2899 => 'NSW',
6798 => 'WA',
6799 => 'WA',
7151 => 'TAS'
);
$postcode = intval($postcode);
if ( array_key_exists($postcode, $exceptions) ) {
return $exceptions[$postcode];
}
foreach ($ranges as $state => $range)
{
$c = count($range);
for ($i = 0; $i < $c; $i+=2) {
$min = $range[$i];
$max = $range[$i+1];
if ( $postcode >= $min && $postcode <= $max ) {
return $state;
}
}
}
return null;
}
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