sort, ignore case

[KingOfHeart]

Anyway to ignore the case when sorting an array?

[Daniel0]

Try this:

 

<?php
/**
* Sorts an associative array case-insensitively
* 
* @author Daniel Egeberg
* @param array $array
* @return array
* @license Released to public domain
*/
function asorti(array $array)
{
$copy = $array;

$array = array_map('strtolower', $array);
asort($array);

foreach ($array as $index => $value) {
	$array[$index] = $copy[$index];
}

return $array;
}
?>

 

I didn't test it, but it should work.

[KingOfHeart]

That script worked nicely. I got another question now.

 

I have a list of files, descriptions, and links.

 

After the files are sorted, I need to match those descriptions and the links in the same order?

How would I go about doing that, because so far it's not going right.

[Daniel0]

Do you understand what my function does and why it works? It copies the array so it has the original. Then it makes all items in the original array lowercase (so that there is no difference in case). Then I used asort() to sort the array, but still preserve the index associativity. Because all items have the same index it's just a matter of looking up the original string from the copy array and put it back in.

 

You can use more or less the same technique for what you require with the descriptions assuming they are in the same order that the filename array originally was.

 

So... something like this perhaps:

 

<?php
$descriptions = array(/* something */);
$filenames = asorti($filenames);

$descCopy = $descriptions;
$descriptions = array();

foreach(array_keys($filenames) as $index) {
$descriptions[$index] = $descCopy[$index];
}

 

Now $descriptions should have the same key order as $filenames does.

[Mark Baker]

function caseInsensitiveSort($a, $b) {
    $a = strtolower($a);
    $b = strtolower($b);
    if ($a == $b) {
        return 0;
    }
    return ($a < $b) ? -1 : 1;
}

$a = array('Apple', 'aardvark', 'ArMadillo', 'AARON', 'ARMour');

usort($a, 'caseInsensitiveSort');

foreach ($a as $value) {
    echo $value.'<br />';
}