At 10:31 PM 7/30/2006, weetat wrote:
I have problem when doing usort() when 'country' = '', i would
like to display records where country = '' last. Any ideas how to do that ?
...
$arraytest= array(
array
(
'country' => '',
)
,
array
(
'country' => 'Thailand',
)
...
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
return ($country1 < $country2) ? -1 : 1;
}
Weetat,
You can sort the blank fields to the end simply by forcing their
evaluated values in your usort callback function:
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if ($country1 == '') $country1 = "zzzzzzz";
if ($country2 == '') $country2 = "zzzzzzz";
return ($country1 < $country2) ? -1 : 1;
}
...or, using ternary syntax:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? "zzzzzzz" : $a['country'];
$country2 = ($b['country'] == '') ? "zzzzzzz" : $b['country'];
return ($country1 < $country2) ? -1 : 1;
}
Regards,
Paul
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