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Re: multi-dimensional array sorting by index (like a table) [message #176356 is a reply to message #176350]

Tue, 27 December 2011 23:16

Denis McMahon
Messages: 634
Registered: September 2010

Karma:

Senior Member

On Tue, 27 Dec 2011 15:25:29 -0500, Michael Joel wrote:

> I am guessing there is no php function to handle sorting an array as you
> could a database? Meaning I want a multi-dimensional array sorted by
> index 0, and "sub sorting" (whatever you call it) using index 4?

Yes, you write a user sort that compares two elements, something like:

function mysort($a, $b) {
if ($a[0] > $b[0]) return 1;
if ($a[0] < $b[0]) return -1;
if ($a[4] > $b[4]) return 1;
if ($a[4] < $a[4]) return -1;
return 0;
}

then

usort($arr, "mysort");

You might want error handling in mysort to make sure that $a and $b are
both actually arrays of at least 5 elements size.

Rgds

Denis McMahon

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[Message index]

		multi-dimensional array sorting by index (like a table) By: Michael Joel on Tue, 27 December 2011 20:25
		Re: multi-dimensional array sorting by index (like a table) By: The Natural Philosoph on Tue, 27 December 2011 21:07
		Re: multi-dimensional array sorting by index (like a table) By: Denis McMahon on Tue, 27 December 2011 23:16
		Re: multi-dimensional array sorting by index (like a table) By: Thomas Mlynarczyk on Wed, 28 December 2011 00:03
		Re: multi-dimensional array sorting by index (like a table) By: Michael Joel on Wed, 28 December 2011 00:24
		Re: multi-dimensional array sorting by index (like a table) By: Denis McMahon on Wed, 28 December 2011 00:39
		Re: multi-dimensional array sorting by index (like a table) By: Michael Joel on Wed, 28 December 2011 01:12
		Re: multi-dimensional array sorting by index (like a table) By: Michael Joel on Wed, 28 December 2011 03:50

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