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sorting a mutli-dimensional array in PHP

Posted on 2011-02-16
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Last Modified: 2012-05-11
Hi there,

Well, the saga which is my first web application continues.  I recently had some help with an algorithm which calculates wins using a monthly tennis house-league matrix of scores and it works great.  But, with my limited exposure to web programming I've again reached a bit of a snag.

I have a 'Top Guns' sidebar.  I would like it to display the top 3 players in every house.  The information includes Name, Total Points, and now, Wins.  Here's what I'm looking to do...I would like the players to be sorted by Wins, and then by Total Points.  For example, if two players have 2 wins each..the one with the most points total points would appear ahead of the other guy.  Here's how my multi-dimensional array looks :

Array
(
    [0] => Array
        (
            [name] => Player 1
            [wins] => 3
            [score] => 24
        )

    [1] => Array
        (
            [name] => Player 2
            [wins] => 0
            [score] => 13
        )

    [2] => Array
        (
            [name] => Player 3
            [wins] => 1
            [score] => 12
        )

    [3] => Array
        (
            [name] => Player 4
            [wins] => 2
            [score] => 18
        )

)

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I have the code to populate the array all set, I just need to be able to sort it according to my specifications.  Any help would be greatly appreciated!
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Question by:duder78
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2 Comments
 
LVL 15

Accepted Solution

by:
ncoo earned 500 total points
ID: 34910045
Just pass your array in to: usort($array, "winScore");

Details: http://uk3.php.net/usort

See code below.
<?php

$array = array(0 => array
        (
            'name' => 'Player 1',
            'wins' => '3',
            'score' => '24'
        ),

    1 => array
        (
            'name' => 'Player 2',
            'wins' => '0',
            'score' => '13'
        ),

    2 => array
        (
            'name' => 'Player 3',
            'wins' => '1',
            'score' => '12'
        ),

    3 => array
        (
            'name' => 'Player 4',
            'wins' => '2',
            'score' => '18'
        )

);

function winScore($a, $b)
{
    if ($a['wins'] == $b['wins']) {
		if ($a['score'] == $b['score']) {

			return 0;
		}
		return ($a['score'] < $b['score']) ? 1 : -1;
    }
    return ($a['wins'] < $b['wins']) ? 1 : -1;
}


usort($array, "winScore");

echo '<pre>';
print_r($array);

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Author Closing Comment

by:duder78
ID: 34910178
Works like a champ, thanks alot!
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