<?php $list = array( array("no"=>3, "cat"=>5, "body"=>"リンゴ"), array("no"=>2, "cat"=>4, "body"=>"みかん"), array("no"=>4, "cat"=>5, "body"=>"ナシ"), array("no"=>6, "cat"=>3, "body"=>"バナナ"), array("no"=>1, "cat"=>4, "body"=>"オレンジ") ); usort($list, create_function('$a, $b', 'return $a["cat"]-$b["cat"];')); print_r("<pre>"); print_r($list); print_r("</pre>"); ?>
