Re: multidimensional array sorting

Kelly, you can use array_multisort() to do what you want. It's a bit convoluted to work with as you'll need to create a secondary array to hold the sorted values to compare back to your multidimensional array. The manual is prety good reference for this http://www.php.net/manual/en/function.array-multisort.php though you'll need to search the user added notes at the bottom for good techniques. I got it to work some time back but can't remember where that script fragment is today, otherwise I'd post it. Hugh ----- Original Message ----- From: "Kelly Protsko" <linuxbox@wepsoft.com> To: <php-general@lists.php.net> Sent: Saturday, April 19, 2003 9:27 AM Subject: [PHP] multidimensional array sorting > I have a text file which I read into an 2-D array so each row holds the > date in its pieces and the event title. I want to sort this array based > on the day of the month in ascending order. > > The array is setup like this: > > January,7,2003,event title > January,1,2003,event title > January,4,2003,event title > > > $list[0][0] = "January"; > $list[0][1] = 3; > $list[0][2] = 2003; > $list[0][3] = "event title"; > > > This is the way I was trying to sort the array but the order doesn't > seem to change. > > usort($lines,compare); > > function compare($x,$y) > { > > If ($x[1] == $y[1]) > return 0; > else If ($x[1] < $y[1]) > return -1; > else > return 1; > } > > > > Kelly > >