Re: Sorting Multidimensional Associative arrays

I tried that fuction, or an absolutely similar one, but if two people are the same age, only one is displayed. Does it happen this way also with your function? (I'm not into arrays that much though...) Thanks. Nicola ----- Original Message ----- From: "Carroll Barrett" <cbarrett@inalt.com> To: <php-general@lists.php.net> Sent: Tuesday, June 27, 2000 12:52 AM Subject: Re: [PHP-GENERAL] Sorting Multidimensional Associative arrays > Alex, > > If you make $r into an array of arrays, then you can use usort() > as follows. I did not try usort() with the 2-dimensional array > you were using. > > > > $r=array(array("skill"=>"supervising","age"=>44,"experience"=>23) > , > > array("skill"=>"welding","age"=>30,"experience"=>9), > > array("skill"=>"carpentry","age"=>60,"experience"=>39), > > array("skill"=>"painting","age"=>57,"experience"=>36)); > > function compare($a,$b) { > if ($a["age"]==$b["age"]) > return 0; > return ($a["age"] > $b["age"]) ? -1 : 1; > } > > usort($r,compare); > for($i=0;$i<count($r);$i++) { > $a=$r[$i]; > echo "Skill=${a["skill"]} Age=${a["age"]} > Experience=${a["experience"]}<BR > >"; > } > > which produces: > > Skill=carpentry Age=60 Experience=39 > Skill=painting Age=57 Experience=36 > Skill=supervising Age=44 Experience=23 > Skill=welding Age=30 Experience=9 > > Regards, > Carroll Barrett > > -----Original Message----- > From: Alex V. <alex@quad.com.ar> > To: php-general@lists.php.net <php-general@lists.php.net> > Date: Monday, June 26, 2000 5:29 PM > Subject: [PHP-GENERAL] Sorting Multidimensional Associative > arrays > > > >I'm trying to sort a multidimensional asociative array. > > > >The array looks like this: > > > >$r[$user]['skill'] > >$r[$user]['age'] > >$r[$user]['experience'] > > > >is it possible to sort this array in such way that the first key > of it > >(user) is the user with the highest age number and the last user > is the one > >with lowest age number? That is.. an descending sorting of users > by their > >age. > > > > > etc. > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > For additional commands, e-mail: php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net > >