Sorry, I just woke up and just posted an reply without thinking, use this:
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if($country1=='' OR $country2=='') {
if($country1==$country2) return 0;
elseif($country1=='') return 1;
else return -1;
} else return ($country1 < $country2) ? -1 : 1;
}
/Peter
-----Original Message-----
From: Paul Novitski [mailto:paul@xxxxxxxxxxxxxxxxxxx]
Sent: Monday, July 31, 2006 1:57 PM
To: php-general@xxxxxxxxxxxxx
Subject: Re: sorting in array
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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