Sorting Arrays

[moon 111]

I have a 3 arrays $arr1, $arr2 and $arr3. I want to sort all of them by $arr3 so that if $arr3 has the values 5, 9, 7 it'll become 5, 7, 9 and the same thing will happen to the other two arrays. How can I do this?

[Cep]

Read this

 

http://uk2.php.net/manual/en/function.sort.php

[moon 111]

No. That won't help me. I already tried that.

 

Example:

 

$title = array('Hello!', 'Title #2', 'A title!');
$description = array('message', 'blah', 'text');

 

If I sort $title and $description seperately it will only mess it up. I want to sort $title and then apply the same thing to $description without mixing up the values.

 

What I want the arrays to look like after the sort is:

 

$title = array('A title!', 'Title #2', 'Hello!');
$description = array('text', 'blah', 'message');

 

Get it?

[Cep]

I don't understand what type of sort your performing from your example, it is neither alphabetical or numerical. If your trying to do a custom sort you need usort().

[GingerRobot]

You can stick them in a multidimensional array and use a user defined sort function.

 

<?php
$title = array('Hello!', 'Title #2', 'A title!');
$description = array('message', 'blah', 'text');
$array= array();
for($x=0;$x<count($title);$x++){
   $array[$x]['title'] = $title[$x];
   $array[$x]['description'] = $description[$x];
}
function mysort($a,$b){
   return strcmp($a['title'],$b['title']);
}
echo '<pre>'.print_r($array,1).'</pre>';
usort($array,'mysort');
echo '<pre>'.print_r($array,1).'</pre>';
?>

 

The returned array might not quite be what you were expecting, but it may actually be more useful.

 

See: http://www.php.net/usort