Multidimensional Array Sorting

[Phenomena]

I'm trying to sort a multidimensional array, but... its not working lol. It's rearranging the array but not in the order I want. I can't even tell what it's being sorted by. >_>

 

My custom strcmp function to compare integers.

function cmpi($a, $b) 
   { 
       if ($a["rank"] > $b["rank"])
           return 1;
       elseif ($a["rank"] < $b["rank"])
           return -1;
       else
           return 0;
   }

 

building the array:

	$i=0;
    foreach($xml_guild_data->guildInfo->guild->members->character as $char) {
	$member[$i]["name"] = $char["name"];
	$member[$i]["level"] = $char["level"];
	$member[$i]["rank"] = $char["rank"];
	$member[$i]["class"] = $char["classId"];
	$i++;
}

 

and finally, sorting/generating html table

usort($member, 'cmpi'); 
foreach($member as $mem) {
?>
	<tr>
		<td><? echo $mem["level"]; ?></td>
		<td><? echo $mem["name"]; ?></td>
		<td><? echo $mem["rank"]; ?></td>
	</tr>
<?
}
?>

 

It should be sorting it be the members rank, which is assigned as an integer.

[jcbones]

    Note: This function assigns new keys to the elements in array. It will remove any existing keys that may have been assigned' date=' rather than just reordering the keys.[/quote']

 

You may be looking for the function uasort() which preserves array_keys.

[Barand]

when I ran your cmpi code it worked ok ???

<?php
$member = array (
       array('name'  => 'fred',
             'level' => 2,
             'rank'  => 3,
             'class' => 5
            ),
       array('name'  => 'john',
             'level' => 1,
             'rank'  => 2,
             'class' => 1
            ),
       array('name'  => 'henry',
             'level' => 1,
             'rank'  => 4,
             'class' => 2
            ),
       array('name'  => 'jane',
             'level' => 1,
             'rank'  => 5,
             'class' => 5
            ),
       array('name'  => 'mary',
             'level' => 3,
             'rank'  => 1,
             'class' => 2
            )

);
  

function cmpi($a, $b)        {            
    if ($a["rank"] > $b["rank"])              
        return 1;           
    elseif ($a["rank"] < $b["rank"])               
        return -1;           
    else               
        return 0;       
}

usort($member, 'cmpi');

foreach ($member as $m) printf ("%d %s<br />", $m['rank'], $m['name']); 

/* results :

1 mary
2 john
3 fred
4 henry
5 jane

**********/ 

?>

 

A simpler cmpi function for integer comparisons is

 

function cmpi ($a, $b)
{
    return $a['rank'] - $b['rank];
}

 

Swap the round for a desc sort

[Phenomena]

I found the solution, the rank was being stored as a string instead of an integer. >.< So I just used strcmp()