Sorting Array

[drisate]

hey guys!

i have an arrays that looks like this:

 

Array
(
[0] => Array
(
[name] => backup_fghj.sql.gz
[size] => 10056579
[perm] => -rw-r--r--
[type] => file
[time] => 22 February 2012 18:53:16
[stamp] => 85745
)

[1] => Array
(
[name] => backup_sdfg.sql.gz
[size] => 13755947
[perm] => -rw-r--r--
[type] => file
[time] => 16 November 2012 14:26:13
[stamp] => 25745
)

[2] => Array
(
[name] => backup_dfgh.sql.gz
[size] => 11936839
[perm] => -rw-r--r--
[type] => file
[time] => 15 September 2012 22:18:55
[stamp] => 84574
)

[3] => Array
(
[name] => backup_erty.sql.gz
[size] => 11009205
[perm] => -rw-r--r--
[type] => file
[time] => 22 July 2012 09:08:16
[stamp] => 34574
)

)

 

 

I need to sort it by stamp desc ... how can i do that?

 

 $file = dir_list("../forum/CPadmin/backups");

 $f=0;
 foreach($file as $fichier){
	 if (strstr($file[$f]['name'], '.gz')){
		 $page_content .= '<a href="/forum/CPadmin/backups/'.$file[$f]['name'].'">'.$file[$f]['time'].'</a></br>';
	 }
 $f++;

[PFMaBiSmAd]

You would either use array_multisort (there's an example at that link showing how to extract the values to sort by) or you would use usort and write a custom function that compares that field in the data.

[Psycho]

function customSort($a, $ B)
{
if($a['stamp'] != $b['stamp'])
{
	return ($a['stamp'] < $b['stamp']) ? -1 : 1;
}
return 0;
}

//use usort() to sort array with custom function
usort($YOURARRAY, 'customSort');

//The original array variable is now sorted

[Barand]

for a DESC numeric sort the function just need to be

 

function customSort( $a, $b )
{
   return $b['stamp'] - $a['stamp'];
}

[PFMaBiSmAd]

multisort example -

<?php
// assuming that $data is the name of your array -

foreach ($data as $key => $row) {
   $sort1[$key]  = $row['stamp'];
}
array_multisort($sort1, SORT_DESC, $data);

[Psycho]

for a DESC numeric sort the function just need to be

 

function customSort( $a, $b )
{
return $b['stamp'] - $a['stamp'];
}

 

Absolutely. I tend to use the initial check to see if the values are different (as in my example) because it let's me easily add additional sorting criteria.So, if the 'stamp' values were the same there could be some additional logic to then sort on field#2, then field#3, etc.

 

So, using your more elegant solution . . .

function customSort($a, $ B)
{
   if($a['stamp'] != $b['stamp']) { return $b['stamp'] - $a['stamp']; }
   if($a['field2'] != $b['field2']) { return $b['field2'] - $a['field2']; }
   if($a['field3'] != $b['field3']) { return $b['field3'] - $a['field3']; }
   return 0;
}