PHP sort multidimensional array by date

[chrish]

I'm having a problem. I have a multidimensional array, that looks like this:\[code\]Array ( [0] => Array ( [0] => Testguy2's post. [1] => testguy2 [2] => 2013-04-03 ) [1] => Array ( [0] => Testguy's post. [1] => testguy [2] => 2013-04-07 ) )\[/code\]I want to sort the posts from the newest date to the oldest date, so it looks like this:\[code\]Array ( [1] => Array ( [0] => Testguy's post. [1] => testguy [2] => 2013-04-07 ) [0] => Array ( [0] => Testguy2's post. [1] => testguy2 [2] => 2013-04-03 ) )\[/code\]How do I sort it?