Sort a 2D array

[Denis -esp2008-]

Hello,

I have a 2D array which I would like to sort. I take
a simple example:

$tab[0][0] = 'toto';$tab[0][1] = 'toto';
$tab[1][0] = 'aaaa';$tab[1][1] = 'titi';
$tab[2][0] = 'aaaa';$tab[2][1] = 'toto';

I would like after the sort :
$tab[0][0] = 'aaaa';$tab[0][1] = 'toto';
$tab[1][0] = 'aaaa';$tab[1][1] = 'titi';
$tab[2][0] = 'toto';$tab[2][1] = 'toto';

I tried to use the usort function, but I'm not able to have the result I hope.

(I'm sorry if you don't understand my english)

Can you help me ?

Thanks,

--
Denis

[Denis -esp2008-]

Bad example.

My problem is:

$tab[0][0] = 'to';$tab[0][1] = 'BB';$tab[0][2] = 'XX';
$tab[1][0] = 'aa';$tab[1][1] = 'AA';$tab[0][2] = 'ZZ';
$tab[2][0] = 'aa';$tab[2][1] = 'CC';$tab[0][2] = 'YY';

I would like after the sort :
$tab[0][0] == 'aa';$tab[0][1] == 'CC';$tab[0][1] == 'YY';
$tab[1][0] == 'aa';$tab[0][1] == 'AA';$tab[1][1] == 'ZZ';
$tab[2][0] == 'to';$tab[0][1] == 'BB';$tab[2][1] == 'XX';

(sorting by line[0] and line[2])

Thanks,

--
Denis