Sort a 2d array (which is nested inside of a multidimensional array) by a column

Question

I think I should be using usort but I have no idea how to get that working.

Array ( [javascript] => Array ( [core] => Array ( [0] => Array ( [file] => /path/to/file.js [weight] => 0 ) [1] => Array ( [file] => /path/to/file2.js [weight] => 1 ) ) ) )

I would like to sort the index of core by the weight value, other files and weights will be added and sorted after also.

Phil · Accepted Answer · 2010-12-08 00:46:07Z

5

usort($array['javascript']['core'], function($a, $b) { return $a['weight'] - $b['weight']; });

answered Dec 8, 2010 at 0:46

Phil

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3 Comments

flyboarder Over a year ago

i needed to create an actual function instead of how you did it about but it worked perfectly, mind explaining what it is doing?

Phil Over a year ago

@user Yeah, sorry. The closure only works in PHP 5.3. Best thing to do is read the usort manual page. It has a pretty good definition of how the comparison function is used.

Ryan Over a year ago

Had to change this to $a->weight - $b->weight because I am using an object, but this is perfect, thanks.

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