RE: [PHP] Sorting multidimensional arrays..

> -----Original Message----- > From: Chad Day [mailto:cday@atpco.com] > Sent: 30 January 2003 19:29 > > I'm struggling with array_multisort, was hoping someone could > give me some > help. > > I have a multidim array, such as: > > $myarray[0][FIRSTNAME] = JOE > $myarray[1][FIRSTNAME] = TIM > $myarray[2][FIRSTNAME] = BOB > > $myarray[0][LASTNAME] = SMITH > $myarray[1][LASTNAME] = BROWN > $myarray[2][LASTNAME] = JONES > > $myarray[0][EXTENSION] = 2000 > $myarray[1][EXTENSION] = 4000 > $myarray[2][EXTENSION] = 1000 > > I was trying array_multisort($myarray[EXTENSION], > SORT_NUMERIC, SORT_DESC), You won't be able to use array_multisort() to do this, as your indexes are the wrong way round. It looks to me like the only solution is using usort() on $myarray, with a callback function that sorts on the [EXTENSION] element; so, something like: function compare($a, $b) { return $a[EXTENSION]==$b[EXTENSION]?0:($a[EXTENSION]<$b[EXTENSION]?-1:1) } usort($myarray, "compare"); Cheers! Mike --------------------------------------------------------------------- Mike Ford, Electronic Information Services Adviser, Learning Support Services, Learning & Information Services, JG125, James Graham Building, Leeds Metropolitan University, Beckett Park, LEEDS, LS6 3QS, United Kingdom Email: m.ford@lmu.ac.uk Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211