Sorting a multidimensional array?

Question

PHP

Let's say we have a multidimensional array:

$data=array(
    array('text'=>'str1', 'year'=>'2010', 'author'=>10, 'theme' => 4),
    array('text'=>'str2', 'year'=>'2011', 'author'=>10, 'theme' => 0),
    array('text'=>'str3', 'year'=>'2009', 'author'=>20, 'theme' => 3),
    array('text'=>'str4', 'year'=>'2010', 'author'=>30, 'theme' => 1),
    array('text'=>'str5', 'year'=>'2010', 'author'=>20, 'theme' => 0),
    array('text'=>'str6', 'year'=>'2011', 'author'=>10, 'theme' => 2),
    array('text'=>'str7', 'year'=>'2011', 'author'=>20, 'theme' => 4),
    array('text'=>'str8', 'year'=>'2009', 'author'=>20, 'theme' => 0),
);

It is necessary to form the data output (say, to a table) in such a way that the lines with 'theme' => 0 would be in the first places, and all other lines would have exactly the same order as in the array.

Answer 1

uasort($data, function($a, $b) {
 return $a['theme']==0 || $b['theme']==0 ? -1 : 0;
});

Try

Answer 2

Offhand.
Go through the array, in the ife check theme for 0, if I add to one array (or immediately move it to the beginning) everything else to another (if it is divided into two arrays)
Then merge them (again, if it is divided into two arrays )