RE: [PHP] sorting multi-dimensional array

> -----Original Message----- > From: Steve Buehler [mailto:steve@vespro.com] > Sent: 20 February 2003 05:25 > > Ahhh....finally did it with usort. Thanks to those who gave me that > answer. Now here is a question for that. I would like to > re-use my "cmp" > function without having to rewrite it each time. Can it be > written so that > instead of "divname" being hard coded, that I can pass the > sort field in > the usort call. That way, I can either sort by "divname" and > do another > sort by "divid" for seperate results without having to have > multiple "cmp" > type functions. I hope that made since. Lack of sleep isn't > good when > programming. Below is my sorting code. > > > function cmp ($a, $b) { > return strcmp($a["divname"], $b["divname"]); > } > > usort($array, "cmp"); Well, the only obvious way I can think of is to use a global variable to set the array index you want to sort by -- something like: function cmp ($a, $b) { global $field; return strcmp($a[$field], $b[$field]); } $field = "divname"; usort($array, "cmp"); $field = "divid"; usort($array, "cmp"); I haven't tested this, but I think it should work...! 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