Re: Sorting array data by week day order

On Thu, 22 May 2003 00:08:38 +0100, you wrote: >It's an array of users and the amount of hours they have done in a working >week. I am plotting the data to a graph using jpgraph and so need to data in >day order. Is there a way to sort the data so I end up with this: If you want an arbitary sort order, you need to apply your own comparison function. This can be acheived with a callback function. uksort() and it's brethren allow you to do this. It's pretty simple, so lets try an example... <? function day_compare ($a, $b) { if ($a == $b) { return(0); } switch ($a) { case 'mon' : $adash = 1; break; case 'tues' : $adash = 2; break; case 'weds' : $adash = 3; break; case 'thurs' : $adash = 4; break; case 'fri' : $adash = 5; break; case 'sat' : $adash = 6; break; case 'sun' : $adash = 7; break; } switch ($b) { case 'mon' : $bdash = 1; break; case 'tues' : $bdash = 2; break; case 'weds' : $bdash = 3; break; case 'thurs' : $bdash = 4; break; case 'fri' : $bdash = 5; break; case 'sat' : $bdash = 6; break; case 'sun' : $bdash = 7; break; } return ($adash > $bdash) ? 1 : -1; } $arr = array ('sat' => 0, 'tues' => 7, 'mon' => 2, 'thurs' => 4, 'weds' => 3, 'fri' => 1, 'sun' => 0); uksort ($arr, 'day_compare'); print_r($arr); ?> That should get you started. Watch out for those *sort*() functions... they sort arrays in place rather than returning a copy.