Question

Possible Duplicate:
PHP: sorting a multidimentional array ($arr[$i]['v'])

I have an array of UNSORTED VERSION type.

$arr['foo']['man']      = 5;
$arr['foo']['str']      = 'string5';
$arr['foobar']['man']   = 2;
$arr['foobar']['str']   = 'string2';
$arr['barfoo']['man']   = 4;
$arr['barfoo']['str']   = 'string4';
$arr['foofoo']['man']   = 1;
$arr['foofoo']['str']   = 'string1';
$arr['bar']['man']      = 3;
$arr['bar']['str']      = 'string3';

I want to sort it in decending order while preserving all other data in that array, i.e.

$arr['foo']['man']      = 5;
$arr['foo']['str']      = 'string5';
$arr['barfoo']['man']   = 4;
$arr['barfoo']['str']   = 'string4';
$arr['bar']['man']      = 3;
$arr['bar']['str']      = 'string3';
$arr['foobar']['man']   = 2;
$arr['foobar']['str']   = 'string2';
$arr['foofoo']['man']   = 1;
$arr['foofoo']['str']   = 'string1';

I have looked at many sorting functions in PHP but havent found any solutions.

Can anybody help me? Thanks in advance.

Answer 1

Use uasort and pass a custom comparison callable:

function compareItems($a, $b) {
    return $b['man'] - $a['man'];
}

uasort($arr, 'compareItems');