这样的数组怎么排序

Question

<?php
$t = array(
'105,140044767714' => '3,2006-07-08 19:29:21',
'100,140029731993' => '3,2006-07-05 00:08:04',
'107,090009807675' => '1,2006-06-01 00:30:06',
'106,090009807675' => '1,2006-07-01 00:45:02',
'109,140032265399' => '3,2006-08-05 08:27:57',
'105,100027839844' => '4,2006-07-01 02:29:30'
);usort($t, 'f');
print_r($t);
function f($a, $b)
{
$a = strtotime(substr($a,1));
$b = strtotime(substr($b,1));
if($a == $b) return 0;
return $a < $b ? -1 : 1;
}
?>

Answer 1

$original = array
(
'105,140044767714' => '3,2006-07-08 19:29:21',
'100,140029731993' => '3,2006-07-05 00:08:04',
'107,090009807675' => '1,2006-06-01 00:30:06',
'106,090009807675' => '1,2006-07-01 00:45:02',
'109,140032265399' => '3,2006-08-05 08:27:57',
'105,100027839844' => '4,2006-07-01 02:29:30'
);foreach($original as $key=>$value)
{
    $a = explode(',',$value);
    $new[$key] =  strtotime($a[1]);
}
asort($new);
$result = array_merge($new,$original);
print_r($result);

Answer 2

function cmp ($a, $b) {    $ra = split(",",$a);
    $rb = split(",",$b);
    if($ra[0]<$rb[0])
        return -1;
    elseif($ra[0]>$rb[0])
        return 1;
    else
    {
        if(strtotime($ra[1]) < strtotime($rb[1]))
        {
            return -1;
        }elseif(strtotime($ra[1]) > strtotime($rb[1]))
            return 1;
        else
            return 0;    }
}
$a = array(
     "105,140044767714" => "3,2006-07-08 19:29:21",
     "100,140029731993" => "3,2006-07-05 00:08:04",
     "107,090009807675" => "1,2006-06-01 00:30:06",
     "106,090009807675" => "1,2006-07-01 00:45:02",
     "109,140032265399" => "3,2006-08-05 08:27:57",
     "105,100027839844" => "4,2006-07-01 02:29:30",
);uasort($a,"cmp");
print_r($a);

Answer 3

<?
 $day=array();
 $day["105,140044767714"] = "3,2006-07-08 19:29:21";
     $day["100,140029731993"] = "3,2006-07-05 00:08:04";
     $day["107,090009807675"] = "1,2006-06-01 00:30:06";
     $day["106,090009807675"] = "1,2006-07-01 00:45:02";
     $day["109,140032265399"] = "3,2006-08-05 08:27:57";
     $day["105,100027839844"] = "4,2006-07-01 02:29:30";
     $tday=array();
   while(list($key,$val)=each($day))
   {
    $tmp=explode(",",$val);
    $val=$tmp[1].",".$tmp[0];
    $tday[$val]=$key;
   
   }
   ksort($tday);
   while(list($key,$val)=each($tday))
   {
    $tmp=explode(",",$key);
    $key=$tmp[1].",".$tmp[0];
    $ttday[$val]=$key;
   }
reset($tday);
print_r($tday);
reset($ttday);
print_r($ttday);
?>
print
Array ( [2006-06-01 00:30:06,1] => 107,090009807675 
[2006-07-01 00:45:02,1] => 106,090009807675 
[2006-07-01 02:29:30,4] => 105,100027839844 
[2006-07-05 00:08:04,3] => 100,140029731993 
[2006-07-08 19:29:21,3] => 105,140044767714 
[2006-08-05 08:27:57,3] => 109,140032265399 ) Array ( [107,090009807675] => 1,2006-06-01 00:30:06 
[106,090009807675] => 1,2006-07-01 00:45:02 
[105,100027839844] => 4,2006-07-01 02:29:30 
[100,140029731993] => 3,2006-07-05 00:08:04 
[105,140044767714] => 3,2006-07-08 19:29:21 
[109,140032265399] => 3,2006-08-05 08:27:57 )